CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM

Thin Surfaces / internal Walls in SnappyHex - Problem with patch allocation

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

LinkBack Thread Tools Display Modes
Old   September 6, 2011, 06:28
Default Thin Surfaces / internal Walls in SnappyHex - Problem with patch allocation
Join Date: Apr 2009
Location: Schleswig, Germany
Posts: 38
Rep Power: 8
Hannes_Kiel is on a distinguished road

sorry for reposting here, but I fear my question would get lost in the subforum otherwise.

I'm trying to generate a mesh around a thin surface / internal wall like a sail. Basically, it works fine, the STL surface mesh is found, properly resolved and written out as external faces / boundary patch. My problem is the following: I haven't managed to assign different boundary patch identifiers to the two sides of the surface, both sides are within one patch with associated normals pointing both directions. I cannot separate them by mergeOrSplitBaffles as the nodes of both sides are not identical. When importing two identical STL surfaces meshes with opposed normals, I get two patches, both seriously fragmented. I know that some have just assigned a finite thickness to their geometry when working on similar problems, others (Russo et al) have written additional routines to get around it. I'm trying to avoid both.

Does anybody know whether a) there is a way to either generate a volume mesh around an infinetly thin geometry with both sides in separate boundary patches or b) split the single boundary patch into two along the edges?

Hannes_Kiel is offline   Reply With Quote


sail, snappyhex, thin

Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Thin foil analsis (sail) - Lift Coeff Problem Kelvin CFX 3 December 22, 2008 17:22
Thin surfaces within a body using DesignModeler? Forrest CFX 7 April 5, 2005 08:21
Multicomponent fluid Andrea CFX 2 October 11, 2004 05:12
Memory allocation problem shhe CFX 4 January 7, 2004 00:00
Meshing thin surfaces Louwrens CFX 8 August 18, 2003 17:49

All times are GMT -4. The time now is 19:11.