Hello all, I am trying to figure out what my convection coefficient for a microprocessor might be. What number should be substituted for m^2 in the equation (W/m^2)K? Also my other question is a two part question. Part A) What is the difference between the temperature load and the ambient bulk temperature. Part B) For most applications would they not be the same? Thanks in advance guys.

convection coefficient will be relative to the environment

temp load > temp is applied

bulk ambient temp > temp for the convection calc

why won't they be the same > convection is less "effective" than something being at a temperature

check this, should cover all your questions:

2012 SOLIDWORKS Help - Convection Heat Coefficient