CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Meshing & Mesh Conversion

Strange results after using refineMesh on radial 2D-Mesh

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 24, 2013, 12:25
Default Strange results after using refineMesh on radial 2D-Mesh
  #1
New Member
 
Steve
Join Date: Nov 2013
Posts: 1
Rep Power: 0
Zarchias is on a distinguished road
Hello cfd-online,

I've been using refineMesh to refine a radial mesh (two concentric cirkels with cells radially extending in between) created in ICEM using an O-grid. The results are satisfactory, except when the cells are angled at approximately 45 degrees (and again at 135, 225 and 315).
At these angles refineMesh returns this strange division of instead of dividing it allong the edges it just divides it horizontally/vertically.

weirdlyrefinedcells.jpg

Something I've noticed is that this angle is right in the middle between my two global directions I've put in refineMeshDict. Upon changing these directions to a different orthogonal set, the strange behaviour shifts to a new position.

The settings in refineMeshDict are the following:

set c0;
coordinateSystem global;

globalCoeffs
{
tan1 (1 0 0);
tan2 (0 1 0);
}

patchLocalCoeffs
{
patch outside; // Normal direction is facenormal of zero'th face of patch
tan1 (1 0 0);
}

directions
(
tan1
tan2
);

useHexTopology true;
geometricCut false;
writeMesh false;


Has any of you encountered this before? And if so, how did you deal with it?

Thanks in advance!

Steve
Zarchias is offline   Reply With Quote

Reply

Tags
openfoam, refinemesh, strange refinement

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
Mesh motion with Translation & Rotation Doginal CFX 2 January 12, 2014 07:21
Ansys mesh for FLUENT software giving unrealistic results, while GAMBIT mesh is fine kbhamidipa3 FLUENT 0 November 30, 2012 16:52
Strange Results With snappyHexMesh calebamiles OpenFOAM Running, Solving & CFD 0 August 14, 2011 16:02
How to control Minximum mesh space? hung FLUENT 7 April 18, 2005 09:38
Gambit problems Althea FLUENT 21 February 6, 2001 08:05


All times are GMT -4. The time now is 03:40.