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-   OpenFOAM Native Meshers: blockMesh (http://www.cfd-online.com/Forums/openfoam-meshing-blockmesh/)
-   -   StartFace (http://www.cfd-online.com/Forums/openfoam-meshing-blockmesh/74899-startface.html)

PantaRhei April 11, 2010 12:38

StartFace
 
Beginner question: when setting up the boundary condition file, how do you know what values to use for the start faces? I know the number of faces is based on the meshing you choose in the BlockMeshDict, but are you expected to know what order the geometry is meshed and the numbering indices? I have no idea what values to put for the startfaces.

PantaRhei April 12, 2010 01:31

So no one here knows how to solve this? How are you guys getting it done?

trautenberg October 18, 2011 03:52

I would very much like to know it too... Have you found out?

Bernhard October 18, 2011 04:18

In general you don't need to think about the numbering, since you can use the name of the boundary. Those are connected in polyMesh/boundary, which is created by blockMesh (or any of the convertors).

trautenberg October 18, 2011 04:51

thanks a lot! I was getting an error creating the mesh and I thought it was caused by this parameter :) it works fine now and I know a bit more than before ;-) thanks!

curiosity August 21, 2012 07:35

Hi,

So that means I can leave it blank, isnt it? I mean, I have, e.g:

maxY
type wall
nFaces 300
startFace

If I write nothing on it, is blockMesh supposed to do it?

Thanks!

Bernhard August 21, 2012 07:55

The boundary file in the polyMesh directory is created by blockMesh.

curiosity August 21, 2012 08:34

Ok, easier then! Thanks! :)

aru.potter August 8, 2015 10:20

nfaces
 
Does it hold good for nfaces too? That is, will the nfaces be automatically detected on typing blockMesh?


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