Finding boundary cells

stephan · November 5, 2006, 08:08

Dear All,

can anybody help me finding a list of cells, which have a boundary face?
any help would be appreciated
stephan

hjasak · November 5, 2006, 08:13

Go to all oundary patches and ask for faceCells(). This will give you a cell index for each face on the boundary. If a face has got 2 or more boundary faces, it will show up in faceCells() for more than one patch.

For examples, have a look at how RANS wall functions fix the value of epsilon in near-wall cells.

Enjoy,

Hrv

mattijs · November 6, 2006, 04:14

There is also a utility called 'cellSet' which takes a cellSetDict dictionary.

Use 'boundaryToCell' as the source (you'll understand if you read the dictionary)

The cellset can be displayed with foamToVTK .. -cellSet xxx

stephan · November 6, 2006, 05:46

Dear All,

thanx for the fast answer!
stephan

gironidegirona · February 4, 2013, 14:59

Hi you all,

I'm Sergi and I'm quite new with all C thing and openfoam

, I'm interested on that. I've just realized how to export the centers of the cells (hard work.. can't imagine..).

Now I'm interested on getting the list of the boundary cells, you say "Go to all boundary patches and ask for faceCells()" my question.. is.. well.. how?

Sorry for this kind of basic questions..

Sergi

November 5, 2006, 08:08	Dear All, can anybody help	#1
stephan Senior Member Stephan Gerber Join Date: Mar 2009 Location: Germany Posts: 118 Rep Power: 6	Dear All, can anybody help me finding a list of cells, which have a boundary face? any help would be appreciated stephan

November 5, 2006, 08:13	Go to all oundary patches and	#2
hjasak Senior Member Hrvoje Jasak Join Date: Mar 2009 Location: London, England Posts: 1,695 Rep Power: 17	Go to all oundary patches and ask for faceCells(). This will give you a cell index for each face on the boundary. If a face has got 2 or more boundary faces, it will show up in faceCells() for more than one patch. For examples, have a look at how RANS wall functions fix the value of epsilon in near-wall cells. Enjoy, Hrv mm.abdollahzadeh likes this. __________________ Hrvoje Jasak

November 6, 2006, 04:14	There is also a utility called	#3
mattijs Super Moderator Mattijs Janssens Join Date: Mar 2009 Posts: 1,416 Rep Power: 13	There is also a utility called 'cellSet' which takes a cellSetDict dictionary. Use 'boundaryToCell' as the source (you'll understand if you read the dictionary) The cellset can be displayed with foamToVTK .. -cellSet xxx

November 6, 2006, 05:46	Dear All, thanx for the fas	#4
stephan Senior Member Stephan Gerber Join Date: Mar 2009 Location: Germany Posts: 118 Rep Power: 6	Dear All, thanx for the fast answer! stephan

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February 4, 2013, 14:59		#5
gironidegirona New Member --- Join Date: Jan 2013 Posts: 8 Rep Power: 2	Hi you all, I'm Sergi and I'm quite new with all C thing and openfoam , I'm interested on that. I've just realized how to export the centers of the cells (hard work.. can't imagine..). Now I'm interested on getting the list of the boundary cells, you say "Go to all boundary patches and ask for faceCells()" my question.. is.. well.. how? Sorry for this kind of basic questions.. Sergi

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