Learning Forum

[105578104]

Hi, I’m trying to model a fluid–structure interaction with impact. For the structure I’d like to use LS-DYNA (or Mechanical Explicit Dynamics), and for the fluid I’m using Ansys Fluent. However, I don’t see an option to connect these solvers through Workbench System Coupling.

• Is LS-DYNA (or Explicit Dynamics) supported in System Coupling with Fluent?

• If not, what workflows are recommended for high-speed impact FSI (e.g., using Mechanical Transient Structural instead, or alternative coupling methods)?

 

[ErKo]

 

 

Hi

That is not possible it seems at the moment.

As you said Transient 2way coupling to Fluent is possible. Or:

USe either ICFD + FSI or S-ALE.

https://www.dynaexamples.com/icfd

https://lsdyna.ansys.com/knowledge-base/incompressible-computational-fluid-dynamics/

All the best

Erik

 

 

[bruce.williams]

You can try the DUALCESE solver in LSDYNA.  This solves the conservation laws (for a compressible fluid) using the Conservation Element and Solution Element (CESE) technique along with the regular solver for the structural component.  You can find FSI examples at https://lsdyna.ansys.com/knowledge-base/cese/.  The following is stated at the link "In LS-DYNA, it is extended to solve fluid-structure interaction problems ..."

[105578104]

Thanks for your response. Actually, I’m planning to model a shear-thickening fluid under impact loading. Which simulation module would you recommend?