I have just setup a simple internal flow simulation with a 11g/s mass flow rate of air as inlet and the air exits to a static pressure of 14.7psi. There is a heat source in the flow path so that air flow is going to take the heat out. Everything runs find but the result is non-sense, because the outlet air temperature is even lower than the inlet air temperature. Please see below.
Anyone can help me to find out what did I do wrong here?