H l f = L ∗ s q r t V / [ k n ∗ R h 2 / 3 ] {\displaystyle Hlf=L*sqrt{V/[{\frac {k}{n}}*{R_{h}}^{2/3}]}}
![{\displaystyle Hlf=L*sqrt{V/[{\frac {k}{n}}*{R_{h}}^{2/3}]}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/166e6a92b9e2867cdc72b0f4353e49c908dc1383)