Table 6 Selected friction factor correlations from the literature
Correlation | Conditions | Range of validity |
|---|---|---|
Hagen-Poiseuille correlation [73] f ⋅ Re = 64 | Laminar flow inside circular channel | Re < 2300 |
Shah correlation [73] \( f\cdot \mathrm{R}\mathrm{e}\approx \left(4\frac{3.44}{\sqrt{\xi}}+\frac{16+0.3125\xi -\frac{3.44}{\sqrt{\xi}}}{1+2.12\times \frac{10^{-4}}{\xi^2}}\right) \) Where \( \xi =\left(\frac{\mathrm{x}}{\mathrm{D}}\right)/\mathrm{R}\mathrm{e} \) | Laminar flow inside circular channel with consideration of entrance length | Re < 2300 |