Understanding and calculating friction loss is crucial for efficient fluid system design. Our powerful online Friction Loss Calculator simplifies determining pressure drop and head loss in pipes, a key factor in hydraulic engineering. Easily input pipe dimensions, fluid properties, and flow rates for accurate results.
Formula:
Darcy-Weisbach Equation for Head Loss:
hf = f * (L / D) * (v2 / 2g)
Where:
hf= Head loss due to friction (meters or feet)f= Darcy friction factor (dimensionless)L= Length of pipe (meters or feet)D= Inner diameter of pipe (meters or feet)v= Average fluid velocity (meters/second or feet/second)g= Acceleration due to gravity (9.81 m/s2 or 32.2 ft/s2)
To calculate f (Darcy Friction Factor) for turbulent flow (using Swamee-Jain equation):
f = 0.25 / [log10((ε / 3.7D) + (5.74 / Re0.9))]2
Where:
ε= Pipe roughness (meters or feet)Re= Reynolds Number (dimensionless)
Reynolds Number:
Re = (ρ * v * D) / μ
Where:
ρ= Fluid density (kg/m3 or lb/ft3)μ= Dynamic viscosity (Pa·s or lb/(ft·s))
Fluid Velocity:
v = Q / A = 4Q / (πD2)
Where:
Q= Volumetric flow rate (m3/s or ft3/s)A= Cross-sectional area of pipe =π * (D/2)2(m2 or ft2)