[zombiaska]

Hi,

I am trying to model heat transfer in a heat exchanger. I tried this model with all boundary conditions turned on, but convergence was unsuccessful.

In methodical theory it was written to try same model without energy equation and firstly get only flow converged. I get this result in attached picture. Not sure what to do. Is it converged? because residuals are stable, but it's value is high. I checked mesh it has max skewness 0.88, average 0.18. For flow I use inlet-velocity and pressure outlet. Also checked flow streams it seems pretty much logic. The one thing I am not sure about is too high value of residuals.

I also monitor outflow velocity. It doesn't almost not oscillate.