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-   -   Mesh directions - checkMesh results (http://www.cfd-online.com/Forums/openfoam-meshing-blockmesh/84499-mesh-directions-checkmesh-results.html)

fusij January 31, 2011 21:44

Mesh directions - checkMesh results
 
Hello all,

Can someone enlighten me about the origin of the following message from the checkMesh utility?:

This mesh has no valid solving directions. dirs = (-1 -1 -1). Please check mesh definition for empty patches.
This is a 0-D mesh
Overall domain bounding box (-4 -3 0) (4 3 0.5)
Mesh (non-empty) directions (0 0 0)
Mesh (non-empty, non-wedge) dimensions 0
***Number of edges not aligned with or perpendicular to non-empty directions: 22126
<<Writing 11884 points on non-aligned edges to set nonAlignedEdges

Has this something to do with the consistency of the axis coordinates when I define my blocks?

paka February 24, 2011 18:41

TIP: When creating a mesh, frontAndBack patches cannot be set up initially as empty ones. That's the reason of this error. Initially set it up to "patch", then you can redefine it in "polyMesh/boundary" file to "empty".

Hope it solves your problem.

Best,
K

wiedangel November 23, 2011 04:47

Quote:

Originally Posted by fusij (Post 293036)
Hello all,

Can someone enlighten me about the origin of the following message from the checkMesh utility?:

This mesh has no valid solving directions. dirs = (-1 -1 -1). Please check mesh definition for empty patches.
This is a 0-D mesh
Overall domain bounding box (-4 -3 0) (4 3 0.5)
Mesh (non-empty) directions (0 0 0)
Mesh (non-empty, non-wedge) dimensions 0
***Number of edges not aligned with or perpendicular to non-empty directions: 22126
<<Writing 11884 points on non-aligned edges to set nonAlignedEdges

Has this something to do with the consistency of the axis coordinates when I define my blocks?

The error will disappear when you define the patches type and donīt use the empty type patch. I hope it will help.

ehsan December 10, 2011 15:07

Mesh moving
 
Hi

I like to move my mesh's cell only by dx/2 and dy/2 and create a new mesh. Could you please help me how to change the blockmesh file to create a new mesh whose cells are moved by dx/2 and dy/2 relative to the first mesh?

Thanks a lot


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