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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Continuty convergence problem › Reply To: Continuty convergence problem

November 2, 2017 at 5:10 pm
omidFSI
Subscriber

Thanks for the reply!

I have a similar flow simulation where the cylinder is perpendicular to the fluid flow. The only difference is using circular fluid domain.
(D: diameter of cylinder, flow left to right, domain diameter:40D, domain depth=3D-5D)


My y+ as I calculated is good and around 5. I am using Spalart-Allmaras and SST- k-omega as later I wanna use these models for more complex geometry.



For high Re (like 88000) and domain depth of around 5D (D-diameter of cylinder), the values of drag coefficient I get is not accurate at all and for all the cases the continuity residual is around 0.1. My previous simulation for a coarser mesh or 2d case had really good result which I don't understand at all!

Any help is appreciated!