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Convergence issue with moving surface

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Old   August 30, 2019, 04:06
Default Convergence issue with moving surface
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Prasun Dutta
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I am facing a convergence issue with the continuity equation in my simulation. I am using a laminar model (Re = 100) for jet impingement on a moving surface. I am not facing this issue with fixed surface or surface movement at low speed. This happens only for if the surface movement velocity is equal or higher than the impinging jet velocity. For these cases, in the starting of simulation, residuals continuity equation start with usual convergence pattern but after some times it diverges. I am attaching a screenshot for better understanding. I have refined the mesh and run several grid tests but the issue remains.
Thanks in adv.
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continuity equation, convergence issue, jet impingement, moving surface

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