Pressure loss calculator, head loss in pipe

Pressure drop calculation algorithm

Checking calculation results.

Calculate values:
• Mean velocity of the fluid
Q - volumetric flow rate, m³/s, A - pipe's cross-sectional area, m², A=πd²/4, d - pipe bore, m
• Reynolds number Re
V - mean velocity of the fluid, m/s, d - diameter, m, ν - kinematic viscosity, m²/c, Rr - hydraulic radius, for round pipe R=d/4, d - diameter, m

Darcy friction factor formula may be applicable depends upon the type of flow that exists.

• The Darcy friction factor for laminar flow Re<2000 is given by the following formula:

• Which friction factor for transition between laminar and turbulent flow 2000<Re<4000 - is given by the following formula:

• The Darcy friction factor for turbulent flow Re>4000 is given by the following formula.
к=Δ/d, Δ - absolute roughness coefficient.

The head loss calculation

The head loss in a pipe, tube or duct can be calculated with the Darcy-Weisbach equation

The pressure drop calculation

The pressure drop can be calculated with the Darcy-Weisbach equation.