[GiDlist] Meshing volumes

[Hannelore Derluyn]

Hello,

I am making a mesh of a cotton fabric and when I want to mesh the
volumes, I always get the following Mesherrors (but meshing the
surfaces gives no problems):
- failed entering octtree
- error creating face
- contour element X is not correct
Has anyone an idea what the reason of those kind of problems is and
how it can be solved? Could it be a problem that the volumes have one
point in common. The measurements of the fabric are also very small,
(0.00023 m thickness) could this be a problem?

Thank you!

[escolano]

The problem is that some volume surfaces are very close, and there is no space between them to fill with tetrahedra

In fact, there is some parte where this surfaces are more than tangents, are intersecting !!
(like the pink part crossing the blue part)

You must to modify the geometric model in order to avoid this zero or near zero thickness parts. (splitting surfaces to share some parts)

Also the scale of your model is a little small (all coordinates near 1e-4) , it's better to scale the model to be near 1 (to decrease numerical errors, and problems with some tolerances



I attach your model reconstructing curves, and surfaces. I generated a volume mesh
(maybe with other sizes you will habe problems near the quasi-tangent parts)

I attach the modified model, including mesh, scaled x 1.0e5.

Regards

Enrique Escolano

----- Original Message -----
From: "Hannelore Derluyn" hannelore.derluyn at student.kuleuven.be
To: gidlist at gatxan.cimne.upc.es
Sent: Friday, April 14, 2006 12:04 PM
Subject: [GiDlist] Meshing volumes


Hello,

I am making a mesh of a cotton fabric and when I want to mesh the
volumes, I always get the following Mesherrors (but meshing the
surfaces gives no problems):
- failed entering octtree
- error creating face
- contour element X is not correct
Has anyone an idea what the reason of those kind of problems is and
how it can be solved? Could it be a problem that the volumes have one
point in common. The measurements of the fabric are also very small,
(0.00023 m thickness) could this be a problem?

Thank you!

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