Question

A hot brass plate is having its upper surface cooled by impinging jet of air at temperature

Answer 1

This is a case of conduction in large plane walls, the dimension of the plate in x direction is very large. Also, one side of the wall is adiabatic.

Calculate the characteristic length.

Calculate the Biot number by using the following relation:

Here, h is the convection heat transfer coefficient, and k is the thermal conductivity of the brass plate.

Substitute for h, for , and for .

220*0.1/110

=0.2