[soankerabhinay]

I am trying to figure out how to create a closed loop heat exchanger model in fluent. My problem with the closed loop system is that my inlet temperature should be updated based on the outlet temperature at every timestep.

See the image below, I want to project outlet temperature profile on to the inlet boundary at every timestep.
I am actually surprised not to find a tutorial on a closed loop heat exchangers. Any help is appreciated.