[cfd_begin]

Hi.
I want to model periodic heat transfer problem in a circular channel with uniform wall temperature, say 330 [K].
IN CFX, I am able to achieve the periodic flow using either a source term in the momentum equation/ by specifying mass-flow rate.
However, when I want to model heat transfer using source term I get weird results.
Can anybody put some light on the source term for the energy equation.
It appears to me that this setting does not solve the periodic temperature but a full flow (includes similar setting like uniform temperature at inlet.