[DQD]

Hi
I have problem about Coil Heat Exchanger
I place the Coil Heat Exchanger in shell with diameter about 0.4m
the equation calculates Nusselt Number for forced convection external tube in my book shows:
Nu = C.Reⁿ.Pr^0.4
which C, n is constant depending on Reynold Number

I don't know is this equation right in my case ?