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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Fluent solution slowing down : 2-way FSI › Reply To: Fluent solution slowing down : 2-way FSI

October 27, 2024 at 2:12 pm
sampathsrikanth1999
Subscriber

Hi Rahul. I ran the case using 15 cores just as you said but I am still facing the same problem. The mesh update is so slow. 

"COUPLING STEP = 111      COUPLING ITERATION = 1". It gets stuck at this place. Its been 30 minutes(still counting). I also tried running a coarser mesh (140k cell in 2 cores). It also encountered the same problem. With time it got slower (it took 5 hrs to calculate 10 coupling steps (step size 1ms)). In the coarser mesh, I also encountered a issue that fluent is not converging. The fluent solution going well till now but now continuity is oscillating around 5e-3 (target 1e-4). 

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