I'm working to simulate a fan on CFX and after the numerical simulation I saw that the residual level doesn't go down below E-3, E-4. Then I want to know which parameter I can play on, in order to achieve a residual level around E-5, E-6.
Domenico di Cugno
if you are simulating a steady run, you can reduce the timestep value.
if you are simulating a unsteady run, you have two possibilities:
a) reduce the dt
b) increase the number of the sub-iterations at every timestep
Again, this question has been asked a million times - please refer to the FAQ
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