CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Meshing & Mesh Conversion

[snappyHexMesh] Boundary face cell does not match with cell face of internal mesh

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   May 20, 2020, 16:46
Default Boundary face cell does not match with cell face of internal mesh
New Member
Leonardo Jesus Miranda MIyazaki
Join Date: Jan 2018
Posts: 5
Rep Power: 7
leonardo13 is on a distinguished road
Hi everyone!

I am using snappyHexMesh without layers, OpenFOAM version 5.0 (but works the same with OF2.4.0). I've checked the mesh with CheckMesh and all seems to be OK. Even I've simulated a flux without errors. But inspecting the mesh with paraview, I realised that there are difference between the decomposition of internalMesh, and the boundary patch mesh.

In the internalMesh there are triangles on faces (because the cell is tetrahedrical), but in the symmetry plane boundary mesh there are just squares on that zone. (is highlighted in the pngs attached). Beyond that, the internal mesh shows that there are two cells on that zone, but the cell list of boundary patch (I've used the spreadsheet inspector as you can see) shows only one cell.

My question is:
1. żIs Paraview the problem? Maybe I have not to trust on visualization of Boundary patch but on Internal mesh. But I compared the number of cells from boundary file:
type symmetryPlane;
inGroups 1(symmetryPlane);
nFaces 4026;
startFace 866311;

and Paraview shows a list from 0 to 4025, which make me think that paraView is already reading well the list of patch faces.

2. żIs SnappyHexMesh the problem? I'm thinking that maybe the only face on boundary patch are linked to two cells con internal mesh, and, It could generate errors in the results after simulation.
The images attached shows big cells with strange shape, but I refined the size of cells and made the cells more squared, but the problem remains.

I'd be very glad if you can help me to discover what's the problem or give me another advice to avoid that. Thanks in advance
Attached Images
File Type: png Mesh1.png (35.6 KB, 8 views)
File Type: png mesh2.png (38.8 KB, 7 views)
leonardo13 is offline   Reply With Quote


meshing 3d, paraview, snappyhexmesh 3d

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
[simpleFoam] Floating point exception seuchsy OpenFOAM Running, Solving & CFD 3 November 3, 2016 10:29
snappyhexmesh remove blockmesh geometry philipp1 OpenFOAM Running, Solving & CFD 2 December 12, 2014 11:58
Question about heat transfer coefficient setting for CFX Anna Tian CFX 1 June 16, 2013 07:28
[Gmsh] Import problem ARC OpenFOAM Meshing & Mesh Conversion 0 February 27, 2010 11:56
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 12:55

All times are GMT -4. The time now is 00:12.