CFD Online URL
[Sponsors]
Home > Forums > OpenFOAM

stitchMesh and snappyHexMesh

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 23, 2009, 03:09
Default stitchMesh and snappyHexMesh
  #1
Member
 
Doug Baldwin
Join Date: Mar 2009
Posts: 53
Rep Power: 7
gdbaldw is on a distinguished road
Is there a robust method for stitching a snappyHexMesh to an underlying Hex Mesh? I presented at Milan in 2008 a robust open source software technique (Blender/CalculiX/Python) for creating a high quality pure Hex Mesh boundary layer grid for any compound/complex surface. At that same OpenFOAM Workshop snappyHexMesh was introduced. What I have recently attempted with some success is to generate an STL that precisely matches the outer surface of the Hex boundary layer, use snappyHexMesh against this STL, and then mergeMeshes/stichMesh the snappyHexMesh to the Hex boundary layer. This method almost always succeeds, however the mesh quality at the stich often has errors. I'd like to learn how to tune both snappyHexMesh and stichMesh to be robust for this approach. I'm using OF-1.6.

My motivation is that the boundary layer mesh precisely matches the detailed features of the underlying body, yet with a very thick boundary layer these features are masked and create an outer surface that is well suited to snappyHexMesh. I've generally found that both patches at the stitch need to have similar face density. However, I have yet to discover a robust recipe for acceptable mesh quality at the stitched patches, and would rather not spend more time on this if it is a fruitless exercise. If this could be made robust, the lack of feature support in snappyHexMesh would no longer be a barrier to its use.

Input and Advice Welcomed,
Doug
gdbaldw is offline   Reply With Quote

Reply

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
stitchMesh duplicate point error romant OpenFOAM Mesh Utilities 0 August 13, 2009 11:47
SnappyHexMesh and 2 Phase Modelling alexm OpenFOAM Mesh Utilities 19 June 18, 2009 19:07


All times are GMT -4. The time now is 08:34.