|
[Sponsors] |
September 21, 2011, 18:06 |
ICEM: Uncovered faces
|
#1 |
New Member
Join Date: May 2011
Posts: 23
Rep Power: 15 |
I am doing a 3D tet automatic mesh in ICEM. The geometry is a pi slice of a disk. At the scissor shaped intersection, I am getting 6 'uncovered faces' and I have included a zoomed out and a zoomed in picture of what I see.
I indicate 'Fix' during the mesh check and I assigned the 'uncovered faces' to a new part. The uncovered face is the black outlined tetrahedral shape in the attached image. How do I fix this problem? The uncovered faces are located at the outlet of my geometry. When I import into fluent, I get 'segmentation fault', so wasn't sure if this was the cause. Thanks. |
|
September 22, 2011, 10:45 |
|
#2 |
Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,663
Blog Entries: 1
Rep Power: 47 |
I can see from your second shot that there is a criss-crossing element there...
Uncovered just means that you have a volume element with at least one face that is not shared by either another volume element or capped by a shell element. It looks like perhaps it is two tetras that are sharing nodes with the adjacent pyramid, but not sharing faces... It may be easiest to simply delete the bad elements and recreate them manually or with the Edit mesh repair option to fill voids with tetra... I have no idea how you got to this point in the first place...
__________________
----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey |
|
September 23, 2011, 11:44 |
Edit Mesh Repair
|
#3 |
New Member
Join Date: May 2011
Posts: 23
Rep Power: 15 |
After deleting offending elements, which tab under Edit Mesh Repair will fill voids with tetra?
I tried Find/Close holes option and selected the entire mesh, but that failed. Thanks. |
|
September 23, 2011, 11:45 |
|
#4 |
New Member
Join Date: May 2011
Posts: 23
Rep Power: 15 |
After deleting offending elements, which tab under Edit Mesh Repair will fill voids with tetra?
I tried Find/Close holes option and selected the entire mesh, but that failed. Thanks. |
|
October 3, 2011, 16:27 |
|
#5 |
Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,663
Blog Entries: 1
Rep Power: 47 |
Yea, perhaps this could be improved... But for some reason the tetra option is only under "Remesh Elements" and not also under "Find/Close Holes in mesh"...
Another way to run it is just make sure that Mesh => Global Mesh Setup => Volume Meshing Parameters => Tetra/Mixed => (Quick) Delaunay has "fill holes in volume mesh" turned on. Then go to "mesh => Compute Mesh => Tetra Mixed => Quick (Delaunay) and apply. It will find and mesh only the holes without trying to re-mesh everything.
__________________
----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[snappyHexMesh] SnappyHexMesh for internal Flow | vishwa | OpenFOAM Meshing & Mesh Conversion | 24 | June 27, 2016 09:54 |
[snappyHexMesh] snappyHexMesh won't work - zeros everywhere! | sc298 | OpenFOAM Meshing & Mesh Conversion | 2 | March 27, 2011 22:11 |
DecomposePar unequal number of shared faces | maka | OpenFOAM Pre-Processing | 6 | August 12, 2010 10:01 |
[snappyHexMesh] external flow with snappyHexMesh | chelvistero | OpenFOAM Meshing & Mesh Conversion | 11 | January 15, 2010 20:43 |
Problem in IMPORT of ICEM input file in FLUENT | csvirume | FLUENT | 2 | September 9, 2009 02:08 |