Dynamic mesh - Stabilization coefficient and convergence behavior

mrkmrk · August 19, 2022, 16:31

Hi Everyone,

I am working on a problem that involves high-frequency oscillations of the structural domain. I applied these oscillations as the wall motion to the fluid domain. Since the frequency of oscillations is so high this diverges the simulations. I reduced the time step size and did everything to improve the stability but these solutions didn't work

Does anyone have any comments on how to overcome the divergence issues in these cases?

Thanks for your attention.

AlexanderZ · August 23, 2022, 02:47

good mesh, small enough timestep thats what you need in case boundary conditions are set properly

August 19, 2022, 16:31	Dynamic mesh - convergence behavior	#1
mrkmrk Member David Join Date: Aug 2013 Posts: 72 Rep Power: 12	Hi Everyone, I am working on a problem that involves high-frequency oscillations of the structural domain. I applied these oscillations as the wall motion to the fluid domain. Since the frequency of oscillations is so high this diverges the simulations. I reduced the time step size and did everything to improve the stability but these solutions didn't work Does anyone have any comments on how to overcome the divergence issues in these cases? Thanks for your attention. Last edited by mrkmrk; August 21, 2022 at 17:05.

August 23, 2022, 02:47		#2
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	good mesh, small enough timestep thats what you need in case boundary conditions are set properly __________________ best regards ****************************** press LIKE if this message was helpful

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