Colebrook equation for friction factor in turbulent flow is given by, f-0.5 = -4 loge [(ε/D) + (1.26/NRe √F). It reduces to Nikuradse equation for a value of (ϵ/D) equal to __________________?

Related Mcqs:

The boundary layer thickness at a given section along a flat plate _____________ with increasing Reynold’s number?

A. Increases B. Decreases C. Remain same D. May increase or decrease...

Equivalent length of a pipe fitting is____________________?

A. Dependent on Reynolds number B. Independent of Reynolds number C. Dependent on the length of the pipe D. None of these...

In case of a pipe exit fitted with a nozzle, the____________________?

A. Conversion of kinetic head to pressure head is facilitated B. Conversion of pressure head to kinetic head is facilitated C. Power transmitted through the nozzle is maximum, when the head lost due to friction in the pipe is equal to one third of the total supply head D. Both B. and C....

Critical velocity in a pipe flow_________________?

A. Increases as fluid viscosity increases B. Increases as pipe diameter increases C. Independent of fluid density D. None of these...

The Prandtl mixing length is_________________?

A. Zero at the pipe wall and is a universal constant B. Independent of radial distance from the pipe axis C. Independent of the shear stress D. Useful for computing laminar flow problems...