Converge issue on steady state pump
I have a mesh of a pump that has Boundary layers on the parts : blade, hub, shroud. it has periodic walls and inlet/outlet.
The BL mesh has elements with aspect ratio of 20000 and a number of jacobian with 0.42 the smaller.
I try to run this pump on CFX and the solver can not converge at the timestep of 1/ω, I am using SST as turbolence model.
If i apply timestep at 1e-9 the solver converge but the results are really bad.
Do you think that might be the mesh that creates the issue? or i have to check something else?
An aspect ratio of 20000 is pretty bad, even in a boundary layer mesh. I agree with you, I suspect you have inadequate mesh quality.
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