Flow through Parallel Plate and Pipe II Achievers Practice Quiz 15

The fanning friction factor (f_f) is

Velocity distribution for laminar flow through pipes is given by

(r = radius of pipe, R = distance between axis of pipe to the boundary)

The flow through a circular pipe is laminar. Now, the fluid through the pipe is replaced with a more viscous fluid and passed through the pipe again with the same velocity. What can we say about the nature of this flow?

For the flow through pipe, Discharge is directly proportion to Dⁿ. Where D, is diameter of the pipe & n is an integer. Then the value of “n” is

Which of the following figure shows the correct distribution of viscous shear stress in pipes?

Consider the following figure:-

For pipe A & B relative roughness are 0.001 & 0.0001 respectively. Flow in pipes A & B are such that Reynold number is same & its value is 1800. What will be relation between friction factor both pipes A & B?

Water at 25° C flows between parallel fixed plates which are kept at a distance of 25 mm apart. Calculate the shear stress at a distance of 6.25 mm from the plate. Given pressure drop per unit length is 2.8 kPa/m.