Pipe Flow
Head Loss — Darcy–Weisbach
Friction head loss in a full pipe. Friction factor f is computed from the Swamee–Jain explicit approximation of the Colebrook equation.
Formula
hf = f · (L/D) · V² / (2g)
Water at 20 °C ≈ 1.004
Resultlive
- Velocity, V
- 1.6977m/s
- Reynolds number, Re
- 2.5363e+5
- Relative roughness, ε/D
- 1.000e-5
- Friction factor, f
- 0.014944
- Head loss, hf
- 7.317m
- Hydraulic slope, S = hf/L
- 14.634m per km
Reference: Darcy–Weisbach with Swamee–Jain (1976) friction factor. Laminar region uses f = 64/Re.