Learning Forum

[yu272]

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!

[Ram Gopisetti]

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 

 

 

[yu272]

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