Q1) A pipeline carrying water has average height of irregularities projecting from the surface of the boundary of the pipe as 0.15 mm. What type of boundary is it? The shear stress developed is $4.9N/m^2$. The kinematics viscosity of water is 0.01 Stokes.

Solution:- Given:-

$K=0.15mm=0.15\times10^{-3}$

$\tau_0=4.9N/m^2$

v=0.01 stokes

$v=0.01\times10^{-4}m^2/s$ …