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Ansys Learning Forum › Forums › Installation and Licensing › Ansys Products › Tutorial or Help for 2 way FSI › Reply To: Tutorial or Help for 2 way FSI

October 30, 2024 at 2:17 pm
ashishkumar.gupta
Subscriber

Thank you Paul for jumping into the topic and helping me out. 

1. So I can continue withe FSI setup and same Mech. and Fleunt BC and solver setup..right? I just have to DEFINE MANUALLY frictionless contact between IR & Ball and OR and Ball with contact offset equal to Lubricant thickness (0.1 mm in my case).

Also, now I have 3 FSI (IR, Ball and OR) with Turbulent model (SST k-w). My timesteps is 1E-07 s and I want to do simsualtion  for 1000 time steps. In Fleunt, coupling iteration is 20 now.

With 10 timsteps my model was running.

2. With 1000 time steps, it is giving 'Negative Dynamic Mesh volume' --- > how to resolve that. (Meshes are quite fine now especially at contact with 0.05 mm and 15 inflation layer).

 

3. what should be the BC in Fluent for IR, Ball & OR? I have analytically calcualted some speed and gave that (Moving Wall with Roational speed arounf their axis)...Is that correct? Because in Mechanical I was just giving Disp. to IR and fixed support to OR and because of contact Ball was rotating.

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