CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM Native Meshers: snappyHexMesh and Others

What does "realtivSizes" mean

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

LinkBack Thread Tools Display Modes
Old   August 31, 2010, 08:05
Default What does "realtivSizes" mean
New Member
Fabian Westrich
Join Date: Jun 2010
Posts: 5
Rep Power: 7
raw_recruit is on a distinguished road
Hello everyone,

at the moment i am trying to get familiar with snappyHexMesh by meshing an airfoil.
I created the initial Mesh with blockMesh. Each cell i created in blockMesh is 0.5m x 0.5m x 0.5m .
The meshprocess didn't make any problems. But i don't understand what relativeSizes mean.

relativeSizes true;

nSurfaceLayers 10;

expansionRatio 1.5;
finalLayerThickness 0.8;
minThickness 0.02;
nGrow 1;
featureAngle 60;
nRelaxIter 5;
nSmoothSurfaceNormals 1;
nSmoothNormals 3;
nSmoothThickness 10;
maxFaceThicknessRatio 0.5;
maxThicknessToMedialRatio 0.3;
minMedianAxisAngle 130;
nBufferCellsNoExtrude 0;
nLayerIter 50;

I read that the thickness values are given as proportional to the undisorted cell size.
For me that means if I have an undisorted cell size of 0.5m (in each direction) that i multiply that value with my minThickness-value of 0.02. So i would have a minThickness of 0.01m. But in my mesh the first layer is a lot smaller.

If someone could explain to me what relativeSizes means that would be great.

Thanks a lot for your help

raw_recruit is offline   Reply With Quote


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

All times are GMT -4. The time now is 12:50.