Friction Factor (ƒM)
Friction factor, in general, was found to be a function of the Reynolds number and pipe relative roughness. Relative roughness is defined here as the ratio of the absolute roughness ε of the pipe inside wall to the pipe inside diameter.
There are several formulae describing friction factors for different flow conditions.
Reference: Sucker-Rod Pumping Handbook, Gabor Takacs
Correlations
- Darcy-Wiesbach (Moody)
- Guo and Ghalambor
Input Parameters
| Name | Input Value - Unit | Converted Value | Validity | Link to Calculation Page | |||
|---|---|---|---|---|---|---|---|
| Pipeline Diameter (d) | 2.259 | in | |||||
| Relative Roughness (ε/d) | 0.0006 | - | |||||
| CALCULATE | |||||||
Results | |||||||
| Correlation | Calculated Value | Warnings | Remarks | ||||
| Darcy-Wiesbach (Moody) | 0.015 | - | For turbulent flow in gas wells and typical tubing strings | ||||
| Guo and Ghalambor | 0.017 | - | Nikuradse friction factor correlation for fully turbulent flow in rough pipes | ||||