How can I define the cell centers without using writeCellCenters?

Taylorreihe · April 21, 2011, 08:34

Hello,

I want to define the cell centers so I have the coordinates for my Velocity U and my pressure p without using the command writeCellCenters. I have a mesh that do not move. Can somebody help me and know a method to avoid that the coordinates are written in every time directory?

Thank you in advance.

ngj · April 21, 2011, 09:35

Hi

You can typically write

Code:

writeCellCentres -help

to see the available options. In your case you can use either

Code:

writeCellCentres -latestTime
writeCellCentres -time <VALUE>

depending on the time folder, where you want the values to be written.

Best regards

Niels

Taylorreihe · April 23, 2011, 18:35

Hi Niels,

thank you very much :-)! It's quite simple :P.

Have a nice weekend.

Best regards,
Kris

sakro · May 5, 2011, 07:54

Hi, my question is pretty much related to this thread =)
is it possible to get cell centers only for a cellSet? Not for every cell in my mesh?

anishtain4 · February 19, 2016, 13:46

I have some trouble with this utility.
I used it on the channel395 tutorial case and grid points don't make any sense:
Y is defined from 0 to 2 in blockMeshDict, but values for both block start from zero to 1. Also the second block is upside down.
There is only 15 unique Z values while there should be 30. Also there is no block in the Z direction so one doesn't expects any irregularity in that direction.

I don't expect the values be ordered (since the grid is stored in an unstructured manner), but I would expect the grids to have correct physical positions. Does anyone knows how to achieve this?

April 21, 2011, 08:34	How can I define the cell centers without using writeCellCenters?	#1
Taylorreihe New Member Taylorreihe Join Date: Dec 2010 Posts: 4 Rep Power: 15	Hello, I want to define the cell centers so I have the coordinates for my Velocity U and my pressure p without using the command writeCellCenters. I have a mesh that do not move. Can somebody help me and know a method to avoid that the coordinates are written in every time directory? Thank you in advance.

April 21, 2011, 09:35		#2
ngj Senior Member Niels Gjoel Jacobsen Join Date: Mar 2009 Location: Copenhagen, Denmark Posts: 1,903 Rep Power: 37	Hi You can typically write Code: writeCellCentres -help to see the available options. In your case you can use either Code: writeCellCentres -latestTime writeCellCentres -time <VALUE> depending on the time folder, where you want the values to be written. Best regards Niels

February 19, 2016, 13:46		#5
anishtain4 Senior Member Mahdi Hosseinali Join Date: Apr 2009 Location: NB, Canada Posts: 273 Rep Power: 18	I have some trouble with this utility. I used it on the channel395 tutorial case and grid points don't make any sense: Y is defined from 0 to 2 in blockMeshDict, but values for both block start from zero to 1. Also the second block is upside down. There is only 15 unique Z values while there should be 30. Also there is no block in the Z direction so one doesn't expects any irregularity in that direction. I don't expect the values be ordered (since the grid is stored in an unstructured manner), but I would expect the grids to have correct physical positions. Does anyone knows how to achieve this? Last edited by anishtain4; February 19, 2016 at 15:32.

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April 23, 2011, 18:35		#3
Taylorreihe New Member Taylorreihe Join Date: Dec 2010 Posts: 4 Rep Power: 15	Hi Niels, thank you very much :-)! It's quite simple :P. Have a nice weekend. Best regards, Kris

May 5, 2011, 07:54		#4
sakro New Member Join Date: Mar 2011 Posts: 6 Rep Power: 15	Hi, my question is pretty much related to this thread =) is it possible to get cell centers only for a cellSet? Not for every cell in my mesh?