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Vector plot on section (polyhedron mesh)

Good morning,

I am en employee in a CFD company. We are currently experiencing a problem with the visualization and I am wondering whether it is due to an incorrect output file or it is just a Ensight standard behavior. We are exporting a polyhedron based mesh (which is correctly visualized) where all variables are stored at the nodes. Now the point is: when extract a section of that mesh and I try to plot the velocity vectors on such a section I end up having "multiple" vectors on each node (see the attached figure) . As I said, I would like to know whether this is the expected behavior or if there is something wrong with the .case (or .variables) files we are currently passing to Ensight.

Regards,

 

Ruggero Poletto @ KARALIT s.r.l.

Ruggero Poletto Answered

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Ruggero,

 

When you create a Clip (a section of the model) and create a vector arrow part from on the clip, you will have one vector arrow starting from each node. If in your geometry you have degenerate nodes (i.e.: multiple nodes at the same location), you will get multiple vector arrows starting from the same nodes.

To avoid this problem, you might want to create a grid clip plane. When using the grid option for the clip plane, EnSight will do a re-mesh of the section cut. This re-meshing will ensure that you have a set of nodes equally distributed.

You can find a more detailed description on the steps to follow at this FAQ:

https://support.ceisoftware.com/hc/en-us/articles/205564387-Uniform-Distribution-of-Vectors

Marina Galvagni 0 votes