CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM

Cells And Points

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

LinkBack Thread Tools Display Modes
Old   May 4, 2010, 16:33
Default Cells And Points
New Member
Andreas Beck
Join Date: Apr 2010
Posts: 5
Rep Power: 9
gimli79 is on a distinguished road
Hi everyone,
I have some questions to the polymesh in OpenFoam 1.6.
For my further computations I need the pressureloads on the several wall elements, without using a postprocessor.
So I tried to find the pressures in the P file. There, they are all listet, but I am not able to identify the correct cell id.
My problem here is that I dont know which cell id corresponds to which wall id. I tried to get these via the points and the cells file in the polymesh, but in version 1.6 no cell file is created.
So my questions are:

Where is the information to the relation between points and cells stored and how can I get access to it ?

Is it possible to say OpenFoam that a cell file should be created?

Is it possible to transform the pressure to nodalforces on the wallpoints and can this then be written out ?

Is it possible to define a kind of outputset, for which the pressures are written out?

I hope that somebody can help me with all these questions.

So,thanks a lot

gimli79 is offline   Reply With Quote

Old   May 4, 2010, 19:33
Alan Russell
Join Date: Aug 2009
Location: Boise, Idaho USA
Posts: 61
Rep Power: 10
AlanR is on a distinguished road
Andy, I don't have access to Foam from here to check the details, but the boundary file in the polymesh directory should help you figure out what point/cell range applies to each of your patches. There is a post processing utility called sample that will help you access data. It has a dictionary file with a lot of settings - I haven't spent much time exploring it yet, but I was able to pull out a set of velocity points. You can search the forum on sample for more info. Good luck,

AlanR 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Import netgen mesh to OpenFOAM hsieh Open Source Meshers: Gmsh, Netgen, CGNS, ... 32 September 13, 2011 05:50
Converting a mesh with splitted cells using fluentMeshToFoam jlpelerin OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 4 April 25, 2011 16:56
external flow with snappyHexMesh chelvistero OpenFOAM 11 January 15, 2010 20:43
BlockMeshmergePatchPairs hjasak OpenFOAM Native Meshers: blockMesh 11 August 15, 2008 07:36
Mesh to points cells faces and boundaries files billy OpenFOAM Pre-Processing 19 April 18, 2006 15:38

All times are GMT -4. The time now is 23:50.