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How can you use the venturi meter system (see Problem 37) to determine whether viscous fluid needs an additional pressure difference to flow at the same speed as a nonviscous fluid?

Hello everyone, This is the problem Based on when 3 m system, we have to deter vine How to find the pressure difference at the same speed as non discuss. Fill it so by using went through a meter we have to discuss the method toe fight Delta P Yeah foot Same speed off non viscous Philip, let us see it The solution for non fiscal laminar flow. If even it's called toe a three we won. It's called Toby three and by one is called to buy three. But why? Tree is less than by one and we three is less than B went for discuss flow. So this is a condition for non viscous Flew on this The condition work biscuits Philip Shoot. That's so thanks for watching it.

Had a flute, flute, flowing fluid flowing has a renal number. Reynolds number equals two renal number. We can suppose are it is equals 2000. So we have to determine which of the following statement of this flow is true. Okay, so uh, we know that there are no number R. E. Or simply are. It is given by row. We are manipulated by L. D. Where roe is the density of the material, density of the material at weber material. And we bar it is the average average speed of the flu, raise the speed of the flu and capital L. It is the characteristic length. It is characteristic length length and pita. It is to it is the viscosity. Okay, viscosity. So if this value of the renal number comes out to be less than 2000, then the flu is called lemon are okay. This flow is called laminar flow and if this number comes out to be greater than 2000, then this flow is called as turbulent flow. Okay, turbulent flow. So in the question we have given that renal number r E Z equals 2000. So it means this flow is a laminar flow. Okay, so this flow is a laminar flow. So from the given options we can see that option, option A is correct. Okay, laminar flow, which is saying that it is a laminar flow. So we can say that option. It will be the correct answer for this question. Okay.

Here in this question, we have been given the inside. The maturity is equals to 0.50 point five mm, european fire mm and the diameter and and and the two is made from the drawn aluminum, which is used in place of expensive valve in a home refrigerator. Now from from from the table. From the table from table of roughness for pipe roughness, the darkness for pipe. For pipe of common engineering material, common engineering material material. We can write, we can write for braun tubing or drawn, doing for drunk driving. The roughness value, the roughness value, roughness value. You're a penis value, which is which can be written as E is equals to zero point double zero 15 mm. Hence we can write, hence we can right reference there loaded. Whatever diameter is equal to zero point double 015 were diameter is given us 0.0 point five, zero point 0.5. So from here we get a different value divided by the diameter is equal to zero point double zero three. So this is the rescue of the roughness value E. To the diameter of the pipe diameter of the pipe. Now from moody diagram, from modi diagram, modi diagram for friction factor four tricks infected for fully developed flow or fully develop the floor developed flow. So we can see, we can see we can see therefore that for He divided very easy equals to 0.003. There is no changing, there is no chance of living a flu at all. There is no charms for laminar flow. Let me no flow hands as the flow. Hence we can say hands flow. He flew his fully terrible and turbulent and so flow flu. And and so so that you so that you you can cannot be earned b considered. Consider as it's more it's more hope you like this or listen, thank you very much.

So here in this problem, we have to take the data from the problem. But 12.61 on Do we have to tell whether we can approximate the floor Toby in compressible or not So pressure peanut, that is the stagnation pressure that we calculated in the last part. In the last question was 44 point to kill Abascal on the pressure which was given a 27.6 killer Paschal. Now, to calculate whether to say, Well, the flow is in compressible. Not we have to calculate the change in percentage density. That means row not minus row over a row which is equals toe Rohnert over ro minus one. Now, if you see the governing equation off ice entropic flow, we can say that be over road to the power case equals to constant. So from here, we can say that row So it is pressure be over. Okay, is equals toe be not over a Ronald K from here p over peanut as equals toe row over a row, not toe the power k From here, run out over a row will be called to p, not overpay to the power or one by K so we can plug this expression hair So this one becomes p not divide by P to the power of one by K minus one. So finally, Delta, a row over row is equals Toe peanut over P to the power one by K minus one. So, peanut, we have calculated as 44.2 kg possible on P. We have 27.6 killer Paschal and the K for air. We have 1.4. So to the power one, divide by 1.4 minus one. So I'm going to simplify this on. We'll get the value US 39.9% age. Now we can see that the percentage change in density is high is very large. So we can we can say that though we cannot say that the flow is in compressible flow, we can say the flow is compressible flow. So this is the required answer for the given problem. So I hope you have understood the problem. Thank you