Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

There are a number of factors that affect head loss such as:

• flow rate
• corrosion and scale deposits
• fittings
• inside diameter of the pipe
• roughness of the pipe wall
• viscosity of the liquid
• length of the pipe
• straightness of the pipe

### Head Loss from Loss Coefficient Formula

$$\large{ h_l = K \frac { v^2 } { 2g } }$$

Where:

$$\large{ h_l }$$ = head loss

ber of factors$$\large{ v }$$ = flow velocity

$$\large{ g }$$ = gravitational acceleration

$$\large{ K }$$ = loss coefficient

Solve for:

$$\large{ v = \sqrt{ \frac { 2g h_l } { K } } }$$