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Remarks Concerning NETGEN

In cases were the tet-mesh comming from Netgen should be used it might be difficult to identify the regions for the bc and loads. The following will describe how to get them.

The native netgen format (file extention .vol) will contain surface elements even if the user had only requested volume elements. This surface elements (shell elements) are grouped according to the mesh-region to which they belong. This circumstance is very helpfull to identify regions for boundary conditions. The shell elements in these regions will be stored in sets if the command ''mats' is used. The setnames will be shown with the command ''prnt se''. If the shell elements will only be used to identify the common nodes of them and the faces of the underlying volume elements. Do the following for the region (set) shellElemSet:

Now you see the faces of the volume elements and the nodes in this region. They can be used for BC and loads definitions (see ''send'').

If you want to delete all shell elements from the mesh you might write the model in abq format and read it again in a new session (cgx -c all.msh). In this case a separate set for each element type is automatically created and you might just delete the elements of a certain set with the ``qdel'' command or you just write the propper set in abq format (after you included also the nodes in the set (see ``comp'').


next up previous contents
Next: Remarks Concerning Duns and Up: Tips and Hints Previous: How to check an   Contents
root 2011-03-26