[IanA]

I am working on similar problem, a closed loop with heat generation. I want to track how the temperature in the loop changes over time.

The two ideas I have are involve breaking the loop into several zones so that I have at least 1 straight section of pipe. I then either:

1) Use a momentum source term

2) Use a fixed velocity term

on the straight section of pipe.

This works to an extent (I get continuous and flow through the loop in one direction). however, a momentum source term is difficult to use to control the velocity and for some reason the velocity in the loop is not equal to what i set as the fixed term. very odd

Any tips would be much appreciated.