[Abbas J]

Hi everyone,

I have heat exchanger of geometry consisting of two paths, one for cold fluid and the other for hot fluid. My geometry is quite large and in order to reduce the fluid domain, I am trying to use fully developed profiles for each of, velocity, pressure fields, temperature, kinetic energy k, and dissipation e.
Would it be possible to write a UDF for all of these variables in order to apply them at inlet section ? Is there available code for fully developed profiles of the non-circular conduit? Also, I am looking for temperature profile as fully hydraulically and thermal developed flow , and I couldn't find anything related to non-circular conduit or channels.
In the first time, I was thinking to separate the two fluids ( separating the two domains) and using periodic analysis within the Fluent. But the wall temperature is not constant along the wall between the fluids.
IF we separate the fluids and consider the wall temperature is constant at each domain, how can we estimate this temperature along the wall as if both fluids is being together? In other words, I can't make thermal analysis on both fluids together to know the wall temperature since the domain is big and it is required large mesh size?

Best regards