Civil Engineering - GATE Exam Questions - Discussion


The Prandtl mixing length for turbulent flow through pipes is

[A]. independent of shear stress
[B]. a universal constant
[C]. zero at the pipe wall
[D]. independent of radial distance from pipe axis

Answer: Option A


No answer description available for this question.

G.Mahesh said: (Jan 31, 2015)  
Prandtl is non dimensional number and relation between ratio of momentum and heat (velocity and temperature).

Ravi said: (Dec 9, 2016)  
Even C is also correct option.

Durga said: (Jan 8, 2017)  
Why not C? It is a basic assumption of fluid mechanics.

Asaithambi said: (Feb 9, 2017)  
It is non-uniform flow.
It is based on shear stress.
It is the ratio between momentum and heat.

Ashay said: (Feb 10, 2019)  
Zero at the pipe wall can also be the answer.

Bhutan said: (Jun 7, 2019)  
Option C is the correct answer.

Mhathung said: (Aug 1, 2019)  
The answer C is also correct.

Pratik said: (Aug 24, 2019)  
C is correct. I too agree.

Niladri Roy said: (Feb 29, 2020)  
Correct answer is zero at the pipe wall.

Halfen said: (May 20, 2020)  
The Correct answer is C.

Pravven said: (Aug 28, 2020)  
It is about turbulent flow So, option C is not correct.

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