||December 8, 2011 04:47
Why is Fluent unable to deal with my model at the micron scale?
My model is a micro turbo rotor spinning in a cylindrical wall. When I scaled the grid by setting the scale factors of xyz to be 0.00001 or lower, the iteration would stop in one step, saying "solution is converged"
At first i thought something was wrong with my grid and settings, so i created a cylindrical pipe model where liquid flows in with a speed magnitude equal to that of the radius through the bottom and out through the top, but this model has the same problem that when the scale factors of xyz are lower than a certain value (0.0009 here), the iteration stops within one or a couple of steps.
however, what has puzzled me is that when the scale factors are greater than a certain value (1e-5 for my rotor model and 0.0009 for the pipe one), the problem doesn't show up and Fluent gives a good solution.
so can Fluent deal with models as small as tens of microns?