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moving mesh stuck, deformed geometry fine?

Posted 15 févr. 2017, 23:06 UTC−5 Geometry, Mesh, Studies & Solvers Version 5.2a 1 Reply

Christian Nadell
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Attached are two very, very similar (simple) 2D models of a disk that moves from left to right. One uses deformed geometry, while the other uses moving mesh. These two physics in principle should each be able to succeed, but in this case for some reason only the deformed mesh approach works!

I can only assume I've made a mistake somewhere in the moving mesh model, but these two are just so darn similar that I can't see where I went wrong. Anyone have any ideas?

Best,
Christian
1 Reply Last Post 17 févr. 2017, 15:08 UTC−5
Christian Nadell
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Posted: 8 years ago 17 févr. 2017, 15:08 UTC−5
I've taken a second look at this, and I'm convinced the problem is either very simple or very complicated. I rebuilt the model from scratch and it seems to work just fine (see v2 attached), but there is still some strange problem with the first model.

I fiddled with the mesh settings, took a closer look at the solver, but... the mesh doesn't move, despite having a time-dependent displacement. If there were some kind of mesh boundary condition error forcing zero displacement, it seems there the solver would fail, but this is not the case. Instead, the solution is zero displacement for the entire time range.

Maybe it's some kind of version-specific error. Can anyone else confirm or deny this model solving in a difference version?
I've taken a second look at this, and I'm convinced the problem is either very simple or very complicated. I rebuilt the model from scratch and it seems to work just fine (see v2 attached), but there is still some strange problem with the first model. I fiddled with the mesh settings, took a closer look at the solver, but... the mesh doesn't move, despite having a time-dependent displacement. If there were some kind of mesh boundary condition error forcing zero displacement, it seems there the solver would fail, but this is not the case. Instead, the solution is zero displacement for the entire time range. Maybe it's some kind of version-specific error. Can anyone else confirm or deny this model solving in a difference version?

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