How do I set-up heat transfer between a stationary fluid and a moving fluid in a copper tube.
This is assuming the hot fluid is heated outside ambient temperature - enough to raise the temperatures of both fluids. I am asking because I am trying to run a simulation with the same set-up, just simplified a bit; but this is the heart of the issue.
In the simulation, interfaces between the hot fluid, copper tube, and cold fluid are connected via mapped interface. The results extracted from the walls of the copper tube showed that it was being heated at least 120 Kelvins above ambient temperature. However, the walls of the cold fluid itself was not being heated. This was the case for both a pressure-based and density based simulation (where the density based simulation had g_e, and STP operating conditions). I want to know why that is so, if that is what I should expect, and, if not, how to change that.
Thank you for your time.