Flow In Pipes

Question 1

What is Couette flow?

Answer 1

Couette flow is flow formed when one plate moves parallel to another, with fluid in between. The pressure gradient is zero, so the fluid forms a constant velocity gradient, from 0 to V_plate.

Question 2

What is Poiseuille flow?

Answer 2

Poiseuille flow is flow between two stationary plates caused by a pressure gradient. Is has a parabolic form, v_x = -((1/2[mu])(dp/dx)) x (H²/4 - y²)

Question 3

How is the loss coefficient K used to find pressure loss across an inlet?

Answer 3

Pressure loss = 1/2 [density]V²K

Question 4

How is pressure change over a pump found?

Answer 4

Pressure increase = W/Q where Q is volumetric flow rate

Question 5

What is the general form for determining pressure drop across a feature of a pipe?

Answer 5

Pressure drop = 1/2 [density]V²K where K is the loss coefficient.