sounds like a setup issue
you didn't tell us what both the inlet and outlet conditions are
do you have everything as adiabatic at the outlet?
what are your expected results
have you checked out some of the tutorial examples and validation examples to get comfortable with the software's capabilities
Inlet: constant mass flow;
Outlet: constant pressure (ambient).
How does SolidWorks compute heating of fluid? Heating is not a part of Navier-Stokes. Any thoughts?
the technical reference includes everything about the equations that are solved
my guess is that with an adiabatic wall, there is nothing that the fluid can do but heat up
hard to diagnose without more details but would recommend you check out the cross flow heat exchanger tutorial