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Ansys Learning Forum › Forums › Discuss Simulation › LS Dyna › FSI using ALE › Reply To: FSI using ALE

March 5, 2024 at 9:18 pm
Ian Do
Ansys Employee

ALE is a hydrocode, meaning it is designed for high gradients problems mostly. Sometimes it can be used with lower P problems, but plate to air or aerodynamics effects is not its intended use. If you have not used ALE in LS-DYNA before you should at least attend the Comprehensive ALE seminar first before first use. 

If the plate slows down a lot then your mat data (too light or too heavy mat?) or BC's/IC's may be incorrect. The required KWs are the set that define the ALE mats and their interactions with the LAG structures.  The coupling KW is ALE_STRUCTURED_FSI (for S-ALE solver, recommended) or CONSTRAINED_LAGRANGE_IN_SOLID (for older ALE solver).

Pls watch the seminar on ALH before trying to model ALE FSI.Â