In this formula, Nusselt Number uses Darcy Friction Factor, Reynolds Number & Prandtl Number. We can use 2 other way(s) to calculate the same, which is/are as follows -
Nusselt Number = 0.023*(Reynolds Number)^0.8*(Prandtl Number)^0.3
Nusselt Number = 0.023*(Reynolds Number)^0.8*(Prandtl Number)^0.4