# GATE Questions & Answers of Laminar and turbulent flow

## What is the Weightage of Laminar and turbulent flow in GATE Exam?

Total 2 Questions have been asked from Laminar and turbulent flow topic of Fluid Mechanics subject in previous GATE papers. Average marks 1.50.

For a steady incompressible laminar flow between two infinite parallel stationary plates the shear stress variation is

The flow of water (mass density = 1000 kg/m3 and kinematic viscosity = 10-6 m2/s) in a commercial  pipe, having equivalent roughness ks as 0.12 mm, yields an average shear stress at the pipe boundary = 600 N/m2. The value of ks/${\mathrm{\delta }}^{\text{'}}$ (${\mathrm{\delta }}^{\text{'}}$ being the thickness of laminar sub-layer) for this pipe is