[whyingwang]

Hi,foamers
Recently I get some troubles.The reslut store in the time file,e.g. 100,200.
The value store the cell's value.But in the polyMesh folder,the points file store the point's coordinate.I don't find the cells file,only the cellZone file.
I want to know, How can I get every cells coordinate?I can only see the point's coordinate, not the cell's.
Thanks

[fumiya]

Hi,

The cells file is not necessary to run the OpenFOAM applications.
I don't understand what exactly you mean by the cell's coordinate,
but you can access the coordinates of cell centers using the
mesh.C():

forAll(U, cellI)
{
    Info<< mesh.C()[cellI] << endl; //cell center coordinate of cellI
}

You can also use the utility "writeCellCentres" to output to the file.

Hope that helps,
Fumiya

[opedrofunk]

Download, instructions, usage, and examples are here:

https://bitbucket.org/peterjvonk/cellcenters

You can use the utility in the standard way, i.e.:

$ cellCenters -latestTime

Or in parallel:

$ mpirun -np <num-processors> cellCenters -parallel -latestTime

This is a bit different than the writeCellCentres utility that comes with OpenFOAM, as it writes the vector to a single file (rather than to three separate files, one for x, y, and z). I found it a bit cumbersome to work with three files, so I wrote this. Hope it helps.

Regards,
Peter

[wyldckat]

Greetings to all!

@Peter: I've created a basic wiki page to help getting your cellCenters utility known to the community that uses OpenFOAM technology: http://openfoamwiki.net/index.php/Contrib/cellCenters

May you or anyone else feel free to update that wiki page!

Best regards,
Bruno

[ayushmorx]

Hello,

I am trying to get cellCenters working for the past couple of days, but unfortunately I am having problems using it. I have attached the output here. Would be glad for any help!
--------------------------------------------------------------------------------------
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 4.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : 4.1
Exec : cellCenters
Date : Oct 25 2017
Time : 03:44:04
Host : "Ayush-Work"
PID : 19641
Case : /media/ayushmorx/HD2/lownu_mine
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 5

Time = 5


--> FOAM FATAL IO ERROR:
error in IOstream "/media/ayushmorx/HD2/lownu_mine/5/cellCenters" for operation Ostream& operator<<(Ostream&, const char)

file: /media/ayushmorx/HD2/lownu_mine/5/cellCenters at line 18.

From function virtual bool Foam::IOstream::check(const char*) const
in file db/IOstreams/IOstreams/IOstream.C at line 96.

FOAM exiting
----------------------------------------------------------------------------------------------------------------

[zhuangli]

Originally Posted by opedrofunk

Download, instructions, usage, and examples are here:

https://bitbucket.org/peterjvonk/cellcenters

You can use the utility in the standard way, i.e.:

$ cellCenters -latestTime

Or in parallel:

$ mpirun -np <num-processors> cellCenters -parallel -latestTime

This is a bit different than the writeCellCentres utility that comes with OpenFOAM, as it writes the vector to a single file (rather than to three separate files, one for x, y, and z). I found it a bit cumbersome to work with three files, so I wrote this. Hope it helps.

Regards,
Peter

Hi,
Sorry to bother.
I want to make sure that after using the cellcnter tool ,the order of cell center coordinate in OpenFOAM file is as same as the cellZones ' s order, what my think is right or not?
Thanks in advance.

_________________
Best regards
Zhuangli