Learning Forum

[yipxx043]

Hi Forum,

I am using the Structured ALE solver and want more detail on the element polynomial order of the multi-material ALE element. Can anyone provide me more detail on element formulation 11? The documentation just says, "1 point ALE multi-material element" and the remark only focuses on recommending using hex and tet elements, but no detail on the element formulation / numerical integration. 

Thanks,

Peter

[Tasos Zacharakis]

Hello Peter,

 

It is equivalent to using the *ALE_STRUCTURED_MULTI-MATERIAL_GROUP keyword for 3D S-ALE simulations.

 

Thank you,

Tasos

[yipxx043]

Hi Tasos,

Thank you for your reply. Can you elaborate? When I look into the Keyword Manual for ALE_STRUCTURED_MULTI_MATERIAL_GROUP, the large boxed area of text just points to the defintion I commented on in SECTION_SOLID of being a "1 point ALE multi-material element". That isn't clear if that means that piecewise linear polynomials are being used (P1)... I assume it is?

Peter

[Kyleronsidine191]

Poor Bunny

Hi Peter

 

Regarding your question, do you think we should look into it? Regarding the disadvantages, it is prone to volume locking, but ALE solves this somewhat through the remapping process (the mesh moves independently of the material).

 

Have you thought about this case?