The formula to calculate the Fanning Friction Factor (ffanning) is:
\[ f_{\text{fanning}} = \frac{f_{\text{Darcy}}}{4} \]
The Fanning Friction Factor is a dimensionless number used in studying fluid friction in pipes. This friction factor is an indication of the resistance to fluid flow at the pipe wall.
Darcy Friction Factor is denoted by f. Its value depends on the flow's Reynolds number Re and on the pipe's relative roughness ε / D. It can be obtained from Moody's chart.
Let's assume the following values:
Using the formula:
\[ f_{\text{fanning}} = \frac{0.1}{4} \approx 0.025 \]
The Fanning Friction Factor is approximately 0.025.
| Darcy Friction Factor (f) | Fanning Friction Factor (ffanning) |
|---|---|
| 0.05 | 0.01250000000000 |
| 0.06 | 0.01500000000000 |
| 0.07 | 0.01750000000000 |
| 0.08 | 0.02000000000000 |
| 0.09 | 0.02250000000000 |
| 0.1 | 0.02500000000000 |
| 0.11 | 0.02750000000000 |
| 0.12 | 0.03000000000000 |
| 0.13 | 0.03250000000000 |
| 0.14 | 0.03500000000000 |
| 0.15 | 0.03750000000000 |