[saksham.pachar]

I have a triangular duct ....

In that i have a fin..........

now I want that the fin should conduct heat from outer wall to fluid flowing through the duct...

so i have two volumes...........one is of duct and other is of fin.

should i use the retain option while subtracting fin from the duct volume.

as when i simply subtract.... the heat transfer reduces..... because there becomes a hole in the bottom wall which is at 400 k

I will mail the files, if any one, can give suggestions on how to do it....