# faceLimited vs. cellLimited ??

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

 March 30, 2010, 04:15 faceLimited vs. cellLimited ?? #1 New Member   Bastian Nebenfuehr Join Date: Feb 2010 Location: Sverige Posts: 27 Rep Power: 13 Good morning everyone, I am writing my Master's Thesis on OpenFoam right now and I made a study concerning different grad- and divSchemes. In order to avoid writing something wrong in my thesis, I would like to ask about the difference between faceLimited and cellLimited gradSchemes. Can anyone explain it, please? What does the factor mean (e.g. faceLimited Gauss linear 1)? Furthermore, let's consider a divScheme like "Gauss linearUpwind faceLimited Gauss linear 0.5". I understand that linearUpwind is a blending between upwind(first order) and linear(second order). But what specifies how much blending is used and why do I have to specify a gradScheme in order to use linearUpwind? So, I hope that these are not too many questions for an early morning. :-) Thank you very much already in advance! Have a nice day, Bastian.

 May 27, 2010, 03:31 #2 New Member   Kasper Kærgaard Join Date: May 2010 Posts: 5 Rep Power: 12 I am also looking for documentation on faceLimited vs cellLimited and the factor. Please help us out here...anyone?

 June 16, 2010, 09:28 #3 New Member   Robert Langner Join Date: Dec 2009 Location: Freiburg, Germany Posts: 27 Rep Power: 13 Hi. The coefficient [0...1] decides, if you got better convergence(=1) or a more accurate solution(=0). See OF1.5 UsersGuide around p.108 for detailed information. ...I'm interested in your Thesis Paper. I would be pleased, if you grant me to take a look at. Regards, Robert PS: Better use tags for your tread to become more visible. Last edited by Robat; June 16, 2010 at 09:32. Reason: add something

 August 10, 2010, 03:58 #4 Senior Member   Dr. Alexander Vakhrushev Join Date: Mar 2009 Posts: 249 Blog Entries: 1 Rep Power: 16 Robert, but what is actually the difference between cell and face limitting? __________________ Best regards, Dr. Alexander VAKHRUSHEV Christian Doppler Laboratory for "Metallurgical Applications of Magnetohydrodynamics" Simulation and Modelling of Metallurgical Processes Department of Metallurgy University of Leoben http://smmp.unileoben.ac.at

 August 13, 2010, 10:28 #5 New Member   Robert Langner Join Date: Dec 2009 Location: Freiburg, Germany Posts: 27 Rep Power: 13 As I unterstood it: faceLimited extrapolates the values between face neighbours and CellLimited does the same for cell neighbours. But better form your own opinion. Just take a look at their source code: http://foam.sourceforge.net/doc/Doxy...8H_source.html http://foam.sourceforge.net/doc/Doxy...8H_source.html The code shows not much of a difference. bests, Robert

August 11, 2013, 14:29
#6
Senior Member

Join Date: Aug 2012
Posts: 229
Rep Power: 11
Quote:
 Originally Posted by Robat Hi. The coefficient [0...1] decides, if you got better convergence(=1) or a more accurate solution(=0). See OF1.5 UsersGuide around p.108 for detailed information. ...I'm interested in your Thesis Paper. I would be pleased, if you grant me to take a look at. Regards, Robert PS: Better use tags for your tread to become more visible.
Dear Robert,

the coefficient that you explain about is e.g "0.5" that is in "Gauss linearUpwind faceLimited Gauss linear 0.5"?

Thank you.

 August 12, 2013, 05:21 #7 Senior Member   Elvis Join Date: Mar 2009 Location: Sindelfingen, Germany Posts: 618 Blog Entries: 5 Rep Power: 21 Hi, here is "Professor Jasak´s Thesis collection" hope you find useful for your needs http://powerlab.fsb.hr/ped/kturbo/OpenFOAM/docs/ http://www.openfoamworkshop2013.org/...rvojeJasak.tar Discretisation Best Practice for Industrial CFD with OpenFOAM