HGP Engineering

|Pipe Flow CalculatorAll ToolsOpen Overtopping Tool

Calculate steady-state pipe flow velocity and discharge using the Darcy-Weisbach equation with Colebrook-White friction factor. Adjust pipe geometry, roughness, and hydraulic head to explore flow behaviour in real time.

100.3 l/s
Flow Rate

Pipe Characteristics

m
0.051.5
m
12000
mm
0.01100
050

Hydraulic Parameters

mAOD
0100
mAOD
0100
m/s²
99.9
m²/s
1e-70.00001

Intermediate Calculations

Available Head (h)7.260 m
Pipe Area (A)0.070686
Relative Roughness (kₛ/D)0.05000
Initial Friction Factor (f₀)0.071551
Initial Velocity (V₀)1.4189 m/s
Reynolds Number (Re)425,655
C-W Friction Factor (f)0.071605
Friction Loss (fL/D)56.188
Total Loss (fL/D + k)70.798

Results

Flow Velocity (V)1.4184 m/s
Flow Rate (Q)0.100263 m³/s
Flow Rate (Q)100.26 l/s

Q vs Pipe Diameter

Q vs Available Head

Velocity vs Head

Reynolds Number vs Diameter

Pipe Schematic

54.56 mAODUpstream47.30 mAODDownstreamD = 0.300 mL = 235.4 mh = 7.26 m