Fluid Mechanics
Darcy-Weisbach Simulator
Examine frictional head loss and pressure drop along pipes. Adjust friction factors, geometry, and velocities to observe hydraulic grade lines and flow regimes.
Flow Type
Turbulent
Re = 996.0k
Medium
Water
20°C standard
Output
CSV
Export ready
Parameters
Pipe Material Preset
Velocity Sweep Animation
Governing Equations
Darcy-Weisbach Equation
hf = f * (L/D) * (v² / 2g)
Reynolds Number
Re = (v * D) / ν
Pressure Drop
ΔP = ρ * g * hf
With kinetic viscosity ν = 1.004 × 10⁻⁶ m²/s (water at 20°C).
Flow is currently in the Turbulent regime.
Hydraulic Grade Line Diagram
Head Loss (hf)
0.82m
Reynolds Number
996016
Pressure Drop
8.0kPa
Flow Rate
0.393m³/s
Head Loss vs Flow Velocity
Flow Performance Data
| Velocity (m/s) | Reynolds Number | Head Loss (m) | Pressure Drop (kPa) |
|---|---|---|---|
| 1.0 | 4.98e+5 | 0.20 | 2.0 |
| 2.0 | 9.96e+5 | 0.81 | 8.0 |
| 3.0 | 1.49e+6 | 1.83 | 18.0 |
| 4.0 | 1.99e+6 | 3.26 | 32.0 |
| 5.0 | 2.49e+6 | 5.10 | 50.0 |
| 6.0 | 2.99e+6 | 7.34 | 72.0 |
| 7.0 | 3.49e+6 | 9.99 | 98.0 |
| 8.0 | 3.98e+6 | 13.05 | 128.0 |
| 9.0 | 4.48e+6 | 16.51 | 162.0 |
| 10.0 | 4.98e+6 | 20.39 | 200.0 |
| 11.0 | 5.48e+6 | 24.67 | 242.0 |
| 12.0 | 5.98e+6 | 29.36 | 288.0 |
| 13.0 | 6.47e+6 | 34.45 | 338.0 |
| 14.0 | 6.97e+6 | 39.96 | 392.0 |
| 15.0 | 7.47e+6 | 45.87 | 450.0 |
| 16.0 | 7.97e+6 | 52.19 | 512.0 |
| 17.0 | 8.47e+6 | 58.92 | 578.0 |
| 18.0 | 8.96e+6 | 66.06 | 648.0 |
| 19.0 | 9.46e+6 | 73.60 | 722.0 |
| 20.0 | 9.96e+6 | 81.55 | 800.0 |