ITTC 1957 - Friction Coefficient
Flat-plate friction coefficient per ITTC 1957 formula - the basis for model-to-ship extrapolation of frictional resistance.
Friction coefficient
0.00153 -
Formula, assumptions, and limits
$$C_F = \frac{0.075}{(\log_{10} Re - 2)^2}$$
Fully turbulent flat plate. Ship Re typically 10⁸–10⁹. For full roughness add $\text{ΔC}_F$ (hull roughness correlation allowance, 0.0004 typical).
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $Re$ | Reynolds number V·L/ν | - | seawater ν = 1.188e-6 |
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