Question

The Nusselt number is defined as Nu = _____ where Lc is the characteristic length of the surface, h is the convective heat transfer coefficient, and k is the thermal conductivity of the fluid.

Answer 1

Answer: Nu = h Lc ÷ k

Explanation: The Nusselt number (Nu) can be defined as the ratio of convective to conductive heat transfer at a boundary in a fluid.

Nu = Convective Heat Transfer h Lc

-------------------------------------- = ---------

Conductive Heat Transfer k

Where h = conductive hear transfer

Lc = length of the surface

k = thermal conductivity of the fluid