3D Modelling in Recuperator System(Heat Exhanchager) with relate to Energy Equatian
 

Hi all,

I am working on a system that is 3D modelled,recuperator(heat exchanger), and would like to analyze in energy equation.

1)First, I have activated in k-epsilon and results were ok, and have been continued in energy equation, occured some increasing sweep relaxation problem.it wasnt ok as though I always had changed some values.

2) the other problem that I have been run across is that as I have initaliazed hybrid in 10 steps. again some problems have occured 'like not reached e-6'

Moreover I changed convergence factors e-7 something like that in solution monitors and again result of problem have not been changed.

3)Last one: Skewness : greater than 0.98, some correction was made in mesh ( face sizing (0.35m) and mapping face) yet result was still constant,

4) Mesh element : between 3-4 millions

Can someone help me out with this problem ? Because that Project is my master thesis and time is running out.