On Tue, May 5, 2015 at 7:10 AM, David Knezevic <david.kneze...@akselos.com>
wrote:
> I'm getting a negative jacobian error for a mesh created in CUBIT. CUBIT
> says that the smallest jacobian in the mesh is around 1.e-4, but when I
> load the mesh into libMesh and call fe->reinit(elem) on each element, I get
> the error below.
>
> The mesh looks fine to me (it's 1.3MB so I can't attach it here, but I'd
> be happy to email it to anyone who is interested). Does anyone have any
> ideas why this might be happening?
>
What kind of elements? If it's QUAD4s, maybe cubit measures Jacobians at
the centroid of each element but then libmesh evaluates them at all the
quadrature points, so the Jacobian goes slightly negative in parts of your
1.e-4 element?
--
John
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