Moody Diagram
Calculate fluid flow friction coefficients from a Moody diagram. Determines the SI-based Moody friction factor (λ) used in the Darcy-Weisbach major loss equation based on Reynolds number and relative roughness.
Moody Diagram Calculator
Calculate fluid flow friction coefficients using the SI-based Moody diagram approach.
Inputs
Provide the following parameters to determine the friction factor:
- Absolute Roughness (k): Surface roughness in meters
- Hydraulic Diameter (d_h): Pipe or duct equivalent diameter in meters
- Reynolds Number (Re): Flow Reynolds number (dimensionless)
Output
- Relative Roughness (r): Calculated as k / d_h
- Friction Factor (λ): Estimated from the Moody diagram
Note: For transient flow (2300 < Re < 4000), interpolate between laminar and turbulent values.