My simulation model has 5.4 million cell, so solver runs very slow. I can't wait it to be coverged. I just stop it running. It is in 225 steps out of total 429. The monitored mass flow rate has been balanced among BC openings. I attached one screen shot here. I'd appreciate if somebody here has comments regarding the result converged or not.
Thank you in advance.
why would you need so many cells? You say need 5 across a gap to get a decent velocity profile....It would probably help top remember that flow sim uses the cut cell approximation for he geometry and hence has structured hex dominated mesh. It is not like unstructured codes where you need a large amount of elements to get a decent number and they take a large number if iterations to converge. Assuming you have covered that one off then there is a large set of tools to lower cell counts from mesh controls to component modeling techniques. The last model you posted looked, in my estiamte to be able to be done with under 100,000 cells and still get a good answer but it is hard to know from looking at an image.