Re: [Libmesh-users] ALE formulation with moving mesh

[Bin L. <lea...@ho...>]

John mentioned about MOOSE library, which is built on top of libmesh. Does MOOSE library make use of "libMesh::DifferentiablePhysics" class? It seems MOOSE library can deal with the multi-physics problems with dynamic mesh in libmesh library quite well. By the way, while sub-dividing an element based on the coordinates extracted by "elem->point()", I noticed that the truncation error of the coordinates of element nodes is relative large. Please correct me, if I am wrong about this. Could it be the reason to affect the convergence rate?

Best
Bin
________________________________
From: Stogner, Roy H <roy...@ic...>
Sent: Saturday, January 11, 2020 6:41 AM
To: Bin Liu <lea...@ho...>
Cc: lib...@li... <lib...@li...>
Subject: Re: [Libmesh-users] ALE formulation with moving mesh


On Fri, 10 Jan 2020, Bin Liu wrote:

> I find that libmesh indeed has a class
> "libMesh::DifferentiablePhysics" to deal with ALE formulation.

On top of what John said, I need to confess that the
DifferentiablePhysics ALE code was never properly finished.  I got it
to a state where it was running but didn't seem to be passing
convergence tests, then the physics people on our project discovered a
quasi-steady formulation which would work even better than our
previous unsteay model, and so I didn't have any more time to devote
to *fixing* the ALE code.
---
Roy