Question

According to darcy's formula the loss of head due to friction in the pipe is

Answer 1

The Darcy equation gives the head loss in turbulent flow for a circular pipe. The friction factor fdepends on the velocity of flow, the pipe diameter, the fluid density and viscosity and the roughness of the pipe.

Answer 2

According to Darcy's formula, the loss of head due to pipe friction is related to the friction coefficient, fluid velocity, acceleration due to gravity, and the pipe diameter.

• Darcy's formula for head loss due to friction is given as

$h_f=F\frac{LV^2}{2gD}$,

where,

F = Darcy's friction factor which is given by F = 4f, where f is the coefficient of friction.

L = length of the pipe (m),

V = fluid velocity (m/s),

D = pipe diameter (m), and

g = acceleration due to gravity (m/s²).

• Darcy's formula is also known as the Darcy-Weisbach equation named after Henry Darcy and Julius Weisbach.
• The equation or, Darcy's formula can be applied to both laminar as well as turbulent flows.