Can Ansys Workbench LS-DYNA handle FSI problem? Ansys LS-DYNA features?

- September 19, 2023 at 4:49 am
  
  Eric Yu
  Subscriber
  
  I am new to LS-DYNA and have a couple of questions about LS-DYNA and its relation to ANSYS. I want to do a fluid-structure interaction simulation with immersed boundary method. I am confused with the LS-DYNA available in ANSYS workbench. Based on an old user guide (2017) I found, it mentioned that workbench LS-DYNA cannot handle two-way FSI problem. Is this feature included in the new version of Ansys?
  If not, is it true that the FSI problem can only be done via LS-RUN? Can I use Ansys product launcher to call LS-DYNA solver to run FSI problem directly?
  I am also curious about whether you can use ANSYS-LS-DYNA to do preprocessing. I noticed that you can export k files from workbench setup for solids, can you do that for fluid as well? Can you export user-defined material from Ansys to k file?
  Thanks!
- September 20, 2023 at 1:51 pm
  
  Ram Gopisetti
  Ansys Employee
  
  Hi
  With newer versions of LSDYNA WB, you can run the ALE, CEL methods.
  That method is not recommended anymore, use the LS-RUN instead.
  Yes, you can use it for pre-processing, you can also do for fluids modelled with ALE, SPH and ISPH.
  No, you cannot export user-defined material from Ansys to k file.
  Cheers, Ram
  - September 25, 2023 at 12:00 am
    
    Eric Yu
    Subscriber
    
    Hi Ram,
    Thank you so much for the information. As a followup, is there any tutorials on how to do FSI problems through workbench LS-DYNA and is ANSYS 22R2 new enough?
    Thanks!
    Eric

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