GATE CH concept:turbulent-flow PYQs & Answers

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concept:turbulent-flow

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Questions 1–3 of 3. Imported answers require independent review unless marked reviewed.

Topic practice 3 questionsPage 1 of 1

For a fully developed turbulent flow of an incompressible Newtonian fluid through a pipe of constant diameter, which of the following statements is/are CORRECT?

Your answerSelect all correct options. You can choose more than one.

Reynolds stress, averaged over a sufficiently long time, is zero everywhere inside the pipe.

Reynolds stress at the pipe wall is zero.

Average velocity of the fluid is half of its center-line velocity.

Average pressure gradient in the flow direction is constant.

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Consider turbulent flow in a pipe under isothermal conditions. Let

denote the radial coordinate and

denote the axial flow direction. On moving away from the wall towards the center of the pipe, the

-component of the Reynolds stress

Your answerChoose one option.

Increases and then decreases

Decreases and then increases

Remains unchanged

Only increases

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Consider a steady flow of an incompressible, Newtonian fluid through a smooth circular pipe. Let

and

denote the kinetic energy correction factors for laminar and turbulent flow through the pipe, respectively. For turbulent flow through the pipe

Here,

is the average velocity,

is the centerline velocity, and

is a parameter. The ratio of average velocity to the centerline velocity for turbulent flow through the pipe is given by

For

, the value of

is __________ (round off to 2 decimal places).

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GATE CH concept:turbulent-flow PYQs

How to practice concept:turbulent-flow

Question 29

Question 16

Question 22