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Assalamualaikum warahmatullahi wabarakatuh peace be upon us
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All is well today
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I want to convey a learning video for
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complete the LMS or learning management system learning process that will
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carried out this semester for the Lidia 1 mechanics course
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Today's theme is the introduction and basic concepts of fluid mechanics
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Let me introduce myself, my name is Sena stmn PHD, I am one of the lecturers
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teacher from the fluid mechanics teaching team 1
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enjoy listening
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OK, next I will explain the basic understanding of
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fluid mechanics What is meant by fluid mechanics
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So, full fluid mechanics means the words fluid and mechanics alone
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It means a substance that is in the form of or is in the liquid phase
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or gas while mechanical mechanical or mechanical itself can be interpreted
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as movement or a movement of substance within a
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There will be a special perspective because of the fluid movement
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There are various perspectives, so they are usually deep
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In mechanics, here there is a special perspective or point of view used
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in reviewing the movement of the fluid
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Well in this context because we are in an engineering learning course
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machine then mechanic
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focus on or directed toward learning movement or movement
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from a fluid or a gas yes under an engineering specific perspective
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machine so we focus more on the perspective because some
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study program or major in the undergraduate program at the university is also studied
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For example, civil engineering, environmental engineering
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engineering, especially Chemical Engineering. So, each major studies mechanics
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fluid but from the perspective of each Engineering department of course in context
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For example, mechanical engineering will study a different focus from chemical engineering
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focus on the engineering process, if we use more machines
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focus on the details of the fluid or fluid mechanics of what happens to it
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fluid machines such as turbines, pumps, etc
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etc. there are other environmental techniques
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This is a very broad aspect of science and can be reviewed from
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various scientific points of view, well in this context once again I
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emphasize this mechanical skin or big mechanic we will review more from
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an engineering point of view of course and from a point of view
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towards science and engineering
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OK, next to learn about skin stages or fluid phase conditions
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the state of the fluid phase. In this case, there are three types, usually the first
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is the Solid phase code for the Liquid phase and the third is the gas phase. Well, if it's a difficult phase
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Solid is usually the easiest, for example ice cubes
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For example, if we freeze water, we put it in
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in the freezer at home or at the office then
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s that water will freeze into ice Well that is an example of a solid full day
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Is that all there are actually many examples of solid fluids for example
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The wax is a form of wax, so it starts out liquid and then
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it hardens into a Solid phase and so on
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Well then the second vaccine is the Liquid phase which is the phase
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it's in the liquid liquid so it's liquid. For example, plain water, then what else
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Syrup is the liquid phase, so they are in the liquid phase, meaning what is the substance
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It occupies a certain container if it was a solid before it had a shape
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Yes, if it's solid it has a certain shape
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Meanwhile, for Liquid, it occupies a certain and usual container
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This liquid will understand the shape of the container. So if the shape of the container is a model like
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It's like this, if the shape of the container is maybe a triangle, it will turn out like that
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triangle and so on Now to save phase
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This gas is different from solids in that the bonds between atoms are very strong
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if it's full liquid, it's atomic bonds, if it's in liquid phase, it's atomic bonds
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is more flexible and can move a little freely so he is quite flexible
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So, in the gas phase, the movement is free, so the movement is free
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The particles in the video move freely when they are present
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There are those who go there, those who go here and there are various movements
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Well, that's why in the context of this gaseous fluid phase when he
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can be placed in a certain container usually it will spread towards
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in various directions from the container, for example there is a glass, put it
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The gas here isn't closed, which means the gas will spread in all directions, but...
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if you put a lid here, that means this gas will spread to
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this gas will spread in this direction only in this container no
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everywhere but it will fill the entire space of the container it is in
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here it is a type of gas phase, well in the context of the engine we will later
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focus more on just two phases, the first phase is the phase
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The second liquid phase is the gas phase while the later hard phase is possible
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will be discussed more in different courses, for example courses
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engineering materials, for example. Well, focus more on that, later there are several types
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all kinds of tests will come in
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discussion on temporary engineering materials courses if so
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we focus on two types of fluid phases, namely the Liquid phase and
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gas phase
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So now what is the application?
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the area of fluid mechanics itself
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application
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One of these areas is the car body design process. Well
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So, for example, if we look at the cars currently on the market
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Currently, there are various forms, but apparently before the product
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This product will be launched on the market by Mas production
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bulk then the product will usually be plasticized first, well
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One of the stages of this design and design is using
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This image means there is something called computational fluid dynamics or CFD. Well
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So the function of this CFD is to simulate fluid movements
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that will hit or pass an object can usually be internal flow or
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flow inside or outside Pro or flow outside in the context of the car body
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This is the designer or design engineer of the car body
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This will design the part of the car, the shape of the car body, which is often different
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so that when in the fluid flow he doesn't experience much resistance or
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collision with language, collision with fluid movement so it has to be
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streamline perhaps so that he is more first one does not shake
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For example, what is the name of this car? This car has faced many collisions
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quotes collision collision of the wind When walking then he will often
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shakes So it's less comfortable. Second, if there's too much of it
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gets resistance from the wind or from the surrounding air then it usually will
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It wastes more fuel because the thrust force is automatically greater. Well
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that's why it's usually on the planners
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engine from the design of the car body they will reduce as much as possible
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obstacles or Dark Force from the folders around the car body
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the
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So, next is the application of this mechanic
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it is in the air flow around the plane or around the helicopter or
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around the wings of the plane Well so this is it
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mechanical applications that still use computational dynamics
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fluid or cfd yes competational skin from mix Well so it turns out if it's deep
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analysis process
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the flow of air around a plane or a plane wing or in a helicopter then
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usually used too
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Why because this ensures when the plane or helicopter
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these are used they do not experience style or
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not losing lift Why is it always dangerous Well if
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because until the plane or helicopter loses lift
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unable to fly properly or with
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it should be possible to cause it to happen
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accident or accident So that's why to minimize these assets
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It takes knowledge called fluid mechanisms to simulate or
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predicting what the motion of fluid flow will be like in objects such as planes
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I am a plane or helicopter so the results are for a design engineer
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and the machine is able to minimize the occurrence
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accidents on a plane crash or crash on a plane or
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helicopter
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in addition to applications of computational fluid dynamics
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in this course there are other more practical applications, for example
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definitely in the wind turbine section, for example, in this wind turbine section
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very important because during the wind turbine design process it is necessary
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determined How many blades How wide of the Blade or what the propeller
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of the wind turbine. How wide is it and
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what is it called when the propeller is installed How much
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The output results are approximate. Well, it's all calculated using principles
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mechanism or for example in the example of typing and
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planning system, well, this also has to use faces as well as later
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for example, the length of the pipe. How much pump power is needed then when
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For example, if there is damage, what should be done?
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detect the pressure, how to design the length of the pipe so that
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the pressure matches the power of the pump and so on
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part of the science of fluid mechanics, another example, for example in applications
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industry, for example industrial applications that use
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there are many examples, for example air pipes, what are they called?
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Yes, an air compressor in an industrial system is a must
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uses a fluid mechanical system so later the design will be done one by one
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The floor plan of an industrial building is here, right?
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what is it called, there is already flow in the compressor. Well, that's what the construction will look like
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What is the direction of the flow when, for example, it is installed in a building
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What industry does the procedure take place in when a drop occurs? Is it then?
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The flow will still be able to reach the required place, for example
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in what building, production building A, for example, requires air, for example, inside
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capacity, for example 100 M3 per second, for example it turns out there is a drop depression there
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So, can we still meet the needs of the production building or?
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No. Well, that is one of the applications of fluid mechanics
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So, the following is a classification of fluid flow that usually occurs in
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whether the flow is internal in a pipe or external
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Let's just take it in general first, because it's still early in the classification
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The fluid flow is viscose and it's easy to visit this viscose
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is he has internal resistance or there is
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turbulence in the fluid flow or what is the simple language?
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There is viscosity
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while the presence or absence of viscosity
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internal upheaval from the video stream, nah
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Approximately in the context of fairly frequent flows does his cost occur
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or visit, well, usually in the context of practical understanding, yes, if that's the case
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Practically, this means, for example, if a fluid flow is stable
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There's a pipe here, for example
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Think of it as a pipe, even though it looks like this
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Well, here is a pipe, for example the pipe is long enough so...
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enters the phase or condition of the develop flow pulley or existing flow
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fully developed Well then now we have reached the full developed flow then
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We can assume that this Pro flow is visit in nature, meaning
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without any internal upheaval from the video itself. Meanwhile, if the viscose is on
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Here, yes, there was turbulence, for example at the beginning of his flow he was still in his flow
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like this, for example. Well, at the beginning the flow is still in shape
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is it irregular or still shaped like this, for example, it looks like
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the difference is a box, for example
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for example, this is what it looks like. Well, this is the beginning of the flow, right?
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usually there is still a lot of internal struggle or viscosity in the
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in the video stream it's like buying silence at first
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pumped in the pipe and then suddenly it has to move because that's why it's in
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At the beginning, the flow is usually temporary but at the end
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usually the flow is assumed to be Why then there is this efficient flow
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actually
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to then make it easier for us as engineers to design a
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Fluid flow, for example, every time we are there there is this flow of viscose
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It's a bit difficult in the design process. Well, that's why if you learn, for example
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Later you will specialize in what area the difference is
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Well, in the plumbing handbook, it's usually assumed to be full
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It's efficient. Why is it easier to design? It's designed, that's why it's usually deep
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practical approach, yes. So there are two approaches here, scientific approach
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fluid mechanisms and there is a practical engineering approach in research
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practical engineering Usually we use a deficit approach, why do we?
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Just ignore what those internal struggles were
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we focus on the flow which is characterized by no turbulence until now
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we find it easier in our writing to design cotton pumps and so on
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so on in fluid mechanics systems
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well next for flow type flow from point of view
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Where the flow is, there is internal flow and there is external flow. Well, if that's the case
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You guys, internal flow is the flow inside an object or body or system
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in the system, for example pipes
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and usually this internal flow is limited space or something
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It's called limited space because it's deep
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Just type. For example, there is a skin flow in this fan. Yes, that means that flow
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So this is in the pipe that we are looking at while this is external flow
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its nature is outside the body or system so it is outside the body or outside of
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For example, the system we are reviewing in this context is a tennis ball
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Tennis means we look at the outside of the tennis ball, well it's like this
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like this nah [Music]
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usually in the context of external flow or outside objects then usually he
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have unlimited space or the space is limited because it is for tennis balls
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a tennis ball that is rolling or flying through the air then yes
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as much as the surroundings go into
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What are the spaces for fluid movement, right? But usually there are
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volume there is a limited volume control volume there so there is an analysis of
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the space from the external flow
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so for example in the flow
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The volume counter is temporarily out of our volume control
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ignore it or let's review it or not. Let's just analyze it
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So, in terms of flow, there are two types of flow, compassible flow and flow
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incompressible This is a flow in which
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fluid parameters such as density and
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other parameters such as temperature, fluid velocity
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not constant for compressible ones
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so compressible so compressible Sibel compressable so that's the origin of the word from
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compare compress and hebel so it can be compressed meaning it has intensity and
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many other variables are always changing
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then well usually this compressible flow
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occurs in Liquid flow or internal fluid flow
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developing flowry This is a developing condition
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So, if this is a developing condition, developing the velocity profile will start
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develop when this has recovered develop velocity profile has fully developed
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Well, usually for compressible ones, flow occurs under these conditions, though
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It's not always the theoretical way, why is it because it's in the develop file
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this is without good his speed and so on still keeps changing him
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all the time because it's still developing, it's still developing
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Well, usually for streams that have fully developed files, we assume this
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go to info Why do you go to the supplier what is it called go to
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incompressible flow because usually when it is fully developed
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theoretically Yes, both density and other parameters will be more
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constant Well so usually that will happen
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period but is it always constant or not so this is the actual understanding
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this compatible flow is easily made by scientists to make it easier for us in
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If you carry out an analysis of the original fluid mechanism system, it is not certain whether it exists or not
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There are fluids that are completely incompressible
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It is certain that it is close to the average compressible in terms of realistic flow
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fluids then usually they will go into the most compressible
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It seems like most of the cases are. Why?
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like that because that's actually why we have flow
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pressing him to move the fluid from one situation to another
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For example, water from city A to city B must be convertible, what's the name?
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If the fluid flow is not compressible, it cannot be compressed and cannot flow
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That's why the average assumption approach in the real world of engineering
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Usually it's compressible, but this is a bit difficult if, for example, we go deep
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designing temporary analysis designs for all variables
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changes on the one hand we don't use
00:22:10
the computational or numerical approach is a bit difficult in context
00:22:15
Technically yes, it may be early planning that is still in nature
00:22:19
Initial engineering design plans usually only use an approach
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inversible Why, because we determine the length and width of the pipe
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For this type of pipe, we usually use uniform destires even later
00:22:33
will change in the middle of the road yes But we are at the beginning because it is the same as a Mini first
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Well, so we can design it because if it goes straight into compressible flow it's a bit
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It's difficult to design the design because there are so many parameters that it can even be done
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So the formulas in the books are not all used because they are averages
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For those of you who are compressible, this flow will use what empirical equations
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or empirical equations are equations that are generated in each special case
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For example, fluid flow in pipe A is the equation x + x + y in pipe B
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The equation x+y+1 How can it be different sir, because different streams start from different
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different temperatures, speeds, different types of pipes will differ slightly
00:23:15
different. So, in the engineering context, what is the approach called?
00:23:21
design planning for S1 Usually we go more into incompressible
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because later you will plan more
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The design at the beginning is temporary to be implemented when it is running, usually later
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there will be what is called a direct measurement
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It's good to use a method, for example using a simple system, that's all
00:23:42
position data control system so during that time the fluid flow will be controlled
00:23:49
you can do that or use a PLC to program the furniture logic controller and so on
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Well, that's why in the context we learn analytically, yes
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theoretical mechanics, so we use more of an approach
00:24:04
incompressible while compressible itself will be used for example later
00:24:09
if we have started to enter into the discussion
00:24:12
computing in fluid makeup or numerical fluid calculations
00:24:18
So, there are three types of fluid flow based on level
00:24:25
There are three types of sketer or regularity in short
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the second is transitional flow and the third type is
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this minor
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Usually it occurs at temperatures that are uh sorry speed
00:24:52
low So it's still slow, it's still slow, yeah, it's still slow, slow motion of the water
00:24:59
So his movements are still slow and usually he's a layer ant
00:25:04
Slayer ant means there is a smooth layer of skin so it exists
00:25:11
a kind of layer but a smooth layer around the skin flow
00:25:15
For example, if the flow in this pipe is like that
00:25:32
This side is transitional so that between it there is still laminar but there is turbulance
00:25:38
a little bit, sometimes it feels like a baby
00:25:43
yeah so it's unstable it's still unstable so sometimes it's experienced sometimes in it and
00:25:48
so on, the second is monthly. So if this turbul is random
00:25:53
Hi police high speed and fluctuating layer so the screen
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fluctuating, we couldn't have done anything else
00:26:02
So he layers the boundaries, well, enter the name and then there will be the name of the course, but
00:26:08
It's just turbulence, I've studied this before
00:26:12
semester month
00:26:22
if in the context of the reality of fluid flow then some
00:26:27
big I can say go in on
00:26:32
all alerts
00:26:36
there is no such thing, so for example, take the most important example
00:26:40
It's easy at home, we have drinking water flowing from the center to
00:26:45
Well, if there is no turbulation, the water cannot reach the house
00:26:50
whether you or not. Even if it's really small
00:26:55
Well, actually, we need fast water, right? Fast water, right?
00:26:58
every day at home. Well, the turbulence there may or may not be the same
00:27:03
This is the case in industry, for example
00:27:10
the industry might be aimed at, for example, air compressors if there aren't any
00:27:16
The contour of the moon, the air compressor won't work, that's not possible
00:27:19
used in the production process so that's why it has to be a month
00:27:23
must be realized, however, during the design or engineering process
00:27:30
Design from the whole context of mechanical engineering is quite difficult
00:27:33
It's still turbulent, turbulent means that the speed is not uniform, it can't be
00:27:38
If you use ordinary formulas quickly, you have to use different empirical statistical formulas
00:27:43
Later, every movement is a formula, all the formulas again and
00:27:48
this is not bad and if you don't use anything use computing or use it
00:27:55
numerical or difficult. Well, that's why in the context of learning
00:27:59
In undergraduate mechanical engineering, we usually use a laminar approach
00:28:03
there is turbulence but yes, it's small because the introduction is basic
00:28:08
Really, if it has entered the intermediate stage, it is still tubulent, but if it is one, yes
00:28:13
because it turns out that even though it is laminar in nature, it is mostly design
00:28:19
good for designing the pipes in the handbody that they use
00:28:23
The approach is linear, first laminar, then usually there
00:28:28
How many correction factors are there to approach this month's conditions?
00:28:33
For example, the tables already exist, so we will go to the seminar first and then we will have them later
00:28:38
the correction table is multiplied by how much or raised to the power so that it is close
00:28:42
There are tables for the turbulent conditions which are already practical
00:28:45
It's really engineering, while in a scientific context it's in a contest
00:28:50
Well, then we'll get into the details of the science. But in practical terms
00:28:54
On average, practical engineering design just uses laminar
00:28:59
later there can be another correction table since the correction table for later
00:29:02
close to original condition
00:29:07
OK, now let's talk a little about systems and control
00:29:10
volume, although it will be discussed again at the next meeting, but we know
00:29:15
Now let's just do the basics
00:29:19
What is the name of the system? The system is something that we review so
00:29:24
For example, if we have this image, this system is the system
00:29:30
For example, if you sleep in your room, then what system do you review?
00:29:34
just your room, you ignore the kitchen, ignore the living room and so on
00:29:38
that this system is all around that is in place
00:29:42
For example, if it's your house, that means in your house what are the roundings?
00:29:46
If you are in the bedroom, the system means that in the bedroom, what is outside is there
00:29:50
living room, for example the storage room. Yes, for example the bathroom and so on
00:29:54
is the rounding. Well, the bonderi or the blender, the bonderi
00:29:58
this is something that demarcates the system you are reviewing with
00:30:01
around you. Well, in the house, for example in the bedroom, the walls
00:30:06
The wall in the bedroom is the boundary of the bedroom system
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outside the bedroom is the bedroom wall
00:30:17
the bedroom is the living room the dining room and so on
00:30:22
Well, the system can be classified into two types
00:30:31
system but moving from this system is usually us
00:30:38
not really discussed in this context
00:30:45
It's a bit complicated to analyze when you move to commit suicide, right?
00:30:50
there must be, you must use some numerical application, for example
00:30:54
integral then differential and then you can calculate from that
00:31:00
but in context
00:31:03
Basically, usually we only play around with a few things, full system or open
00:31:08
system Well, if that system is the system above, it will be this system
00:31:12
closed so no mass flow can enter and exit
00:31:16
but energy can What are the examples, for example
00:31:22
This tank has a tank. We'll put a fire under this tank
00:31:27
We put a fire under it so that the air in the tank gets hot
00:31:32
Well this means that in this matter there can be energy coming in and going out
00:31:37
but we use this so that there is no problem going out so even in
00:31:43
The air does get hot but there's no problem, can't air get in or not
00:31:46
Air can come out if the flashlight is closed, but actually if the system is open, for example
00:31:50
For example, if the nozzle is open, why is it because it can
00:31:55
entering and leaving energy can enter and exit it is
00:31:59
open system Well, later for the fluid one we will
00:32:05
more go to the closed one here or the Open SIM that is open
00:32:10
which is closed
00:32:15
occasionally but not much because this has to involve numerical processes
00:32:20
or computing processes on a computer
00:32:30
OK, next are the dimensions and units and this machine is actually one
00:32:34
basics that you need to know before you learn more about
00:32:38
Frida mechanics, for example, here there is an acceleration variable, yes or
00:32:43
there is angular acceleration there is angular acceleration and so on Okay Well
00:32:51
Later, each of these variables will be expressed in dimensional form
00:32:55
In principle, there are two dimensions, one system is MLT or mass m, Mas is m
00:33:04
the l is Lang and the t is Time
00:33:08
another one is flt flt is Force Lang and time
00:33:16
In fact, we only come to the world together if we want to
00:33:19
In general, I usually use MLT, but FLT can also be used, just a little less
00:33:26
For example, if we talk about basic wheel mechanics lessons, okay
00:33:33
Well, in MLT, this is an MLT system, so there are acceleration variables, there are angles
00:33:39
Angular acceleration has angular speed and area and so on
00:33:45
in ml and t dimensions, so all of these will be expressed as dimensions
00:33:52
MLT okay, so we'll learn a little later because this is still preliminary
00:33:59
related How to convert each of these variables
00:34:03
into MLT dimensions. OK, later we will learn the basics first. How to do it
00:34:11
converting each of these variables into ML and t dimensions
00:34:18
well this is the basic equation before we get in or can convert
00:34:24
These variables become MLT dimensions so they are the basic equations
00:34:28
You must know before you can change the variable dimensions
00:34:33
be dimensions expressed in the form ML and t whatever they are
00:34:40
The first is multiplication. Remember, if you multiply and there are exponents then
00:34:45
The powers are added, yes, here we have a to the power of m times a
00:34:51
to the power of n, if you divide it, am + n means less than M divided by a to the power of n
00:34:59
= a - a raised to the power m minus n
00:35:05
If you raise it to a double power like this, that means just multiplying it means that a
00:35:11
to the power of m to the power of n means a to the power of m of n if you put it like this
00:35:18
So if you put it to one power, it means it's the same, you can also separate it, it means if
00:35:23
ab to the power of m yes that would also be a to the power of m times B
00:35:29
to the power of m So if you reverse it like this a is to the power of minus n yes There is a minus in
00:35:35
Remember here, then it becomes 1/a to the power of n or reversed, a ^ n = 1/a
00:35:43
power minus n so how to apply this is an example
00:35:46
Let's just say we have an equation of forces equal to
00:35:53
Mass times acceleration is Newton's law, right?
00:35:59
Well, how do we know that the dimensions of m are m, so m is big, like
00:36:04
This
00:36:06
OK, then what is A, what is A, acceleration, well, this acceleration means something
00:36:12
We have to express it first in the form of another equation because right
00:36:16
acceleration is speed over time Okay that means we
00:36:20
first write under it what A is
00:36:25
speed divided by time Okay and what is speed also?
00:36:33
distance divided by time
00:36:39
Let's write one by one. How is this distance identical to what is it identical?
00:36:47
with what do you remember yes here we use the formula that
00:36:51
For now, use this formula first
00:36:54
So the speed formula can be simplified to LT
00:37:01
to the power of minus 1 like this, then if we go back to the top it will be
00:37:08
we put Yang which what is this here so it is equal to
00:37:15
LT
00:37:18
-1 divided [Music]
00:37:22
t yes because it's dimensions t okay well we use which one we use which is divided
00:37:28
This one is divided into min 1 minus 1 = -2, let's use this one
00:37:36
so equal to
00:37:39
l * t to the power minus 2 so now we move that
00:37:48
this move this to here
00:37:51
yes, so mass times lt
00:37:58
min 2 =
00:38:02
m l t
00:38:08
power minus 2 OK So here's an example of the application of
00:38:14
basic equations into a reduced dimension
00:38:19
[Music] The next term you need
00:38:22
know is about homogeneous dimensions or homogeneous dimensionism. So, that's it
00:38:28
The principle here is that the word homogeneous means the same thing, so
00:38:32
The right side of the dimension will be the same as the left side of the dimension. What does that mean?
00:38:39
like this, for example, we have this formula, GLBB, yes, in physics. Yes, what about V speed
00:38:45
final = v0 initial velocity added a acceleration 3 liters of time Well so if
00:38:54
an equation is said to have homogeneous dimensions when the dimensions are on the sides
00:39:00
The left is the same as the dimensions on the right side of the example in this contest
00:39:05
This means that here the speed is one, I already explained that earlier
00:39:10
The previous term is the same as v0, also lt-1, plus the acceleration was LT
00:39:16
min 2 I have explained it before and multiplied by T or the time dimension, well LT
00:39:23
min 2 times t means the t decreases to alt -1 so laugh we see in
00:39:27
here lt-1 = lt- LTE to the power minus 1 plus
00:39:35
lt^-1 so between the left side will be the same as the right side so it can be said
00:39:42
the equation has homogeneous dimensions
00:39:50
The next thing is that the equation has no dimensions. Well, what else?
00:39:55
Previously, dimensions meant that dimensions existed, for example for force dimensions, right?
00:40:00
mlt-2 Well, this is an equation
00:40:04
which has no dimensions or is also called non-dimensional
00:40:09
equation, well, what's that, so the principle is the same?
00:40:12
actually it doesn't have dimensions. Is it ML or t so it doesn't have dimensions
00:40:18
in other words, it means the dimension is 1, now
00:40:23
What does it mean, so this dimension is not an equation, yes, it will be
00:40:29
states a general phenomenon of fluid flow or physics
00:40:35
That's why scientists all over the world are competing to find the name
00:40:40
dimensional does not stand together without this dimension in order to say
00:40:44
in general from a phenomenon. Is it a hitransfer phenomenon?
00:40:50
Fluid flow or mass transfer phenomena are the same
00:40:57
once and usually it's toys like this, the toys are at a high level
00:41:00
postgraduate, yes, at undergraduate level we don't play there, but it's important
00:41:05
Well, what's important for us to know at undergraduate level, yes, no similarities
00:41:09
This dimension is the first without this dimension it can be used for
00:41:14
designing or designing a system that we need, for example
00:41:19
designing piping this number is used for designing
00:41:24
Messenger design suppose or suppose fluid flow in an exchanger
00:41:30
Heat and various things are usually used in the spherical hit phenomenon
00:41:35
Well, even if it is in the context of our undergraduate level
00:41:40
just understand the use of the application in the planning or
00:41:44
designer of a system in this context yes in the context of this course
00:41:48
meaning the context of fluid mechanics okay so the first example is
00:41:54
dimensions that are not dimensionless equations are saying this if we
00:41:59
skin and skin, result one, result 1, then enter the same number as he does
00:42:04
dimension 1, yes, the frantal number is the same as that dimension
00:42:08
1 Okay, so if we look at all of this, they all have the same dimensions
00:42:14
with 1 or the term is a dimensionless number which we will use later
00:42:19
Again, for nasal and pranto, it looks like we're at Max or not
00:42:23
Just know what will happen in the future for the next chapters, right?
00:42:28
prefer to use the rangeless number or say
00:42:33
Well, finally, there is a reference that you can use later to study
00:42:38
further from the material that I have previously conveyed
00:42:41
Okay, I'll finish this learning video. Assalamualaikum warahmatullahi
00:42:46
wabarakatuh greetings to all of us
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