Exchanging fields across processor boundaries

RoE · May 18, 2011, 12:05

Hi!

To parallelise a home-brewed (OpenFOAM-) code I have to send some fields across processor boundaries. Specifically, I need the cell centers of the faceCells at the processor boundaries and the values of a volScalarField stored at those centers. I have begun to code this but probably it is already implemented in OpenFOAM, isn't it?Any advise how to send these fields is welcome!

Thanks for your help!
Roland

deepsterblue · May 18, 2011, 12:11

The processorFvPatch / processorPolyPatch classes already do this for you.

Take a look at the sources.

RoE · May 18, 2011, 12:21

Hi Sandeep,

thanks for your reply!

I know that the processorFvPatch / processorPolyPatch classes would normally do this for me. However, I have implemented a few methods which step out of the normal FVM-framework of OpenFOAM, it's a finite differences method which draws heavily from neighbour relations in specific directions. I have written my own code to describe these relations and would like to extend it to parallel computations. Thus, I have to exchange the fields mentioned above by "hard coding" the data exchange in my code...

Thanks again!
Roland

May 18, 2011, 12:05	Exchanging fields across processor boundaries	#1
RoE New Member Roland Engberg Join Date: Jan 2011 Posts: 14 Rep Power: 16	Hi! To parallelise a home-brewed (OpenFOAM-) code I have to send some fields across processor boundaries. Specifically, I need the cell centers of the faceCells at the processor boundaries and the values of a volScalarField stored at those centers. I have begun to code this but probably it is already implemented in OpenFOAM, isn't it?Any advise how to send these fields is welcome! Thanks for your help! Roland

May 18, 2011, 12:11		#2
deepsterblue Senior Member Sandeep Menon Join Date: Mar 2009 Location: Amherst, MA Posts: 403 Rep Power: 25	The processorFvPatch / processorPolyPatch classes already do this for you. Take a look at the sources. __________________ Sandeep Menon University of Massachusetts Amherst https://github.com/smenon

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May 18, 2011, 12:21		#3
RoE New Member Roland Engberg Join Date: Jan 2011 Posts: 14 Rep Power: 16	Hi Sandeep, thanks for your reply! I know that the processorFvPatch / processorPolyPatch classes would normally do this for me. However, I have implemented a few methods which step out of the normal FVM-framework of OpenFOAM, it's a finite differences method which draws heavily from neighbour relations in specific directions. I have written my own code to describe these relations and would like to extend it to parallel computations. Thus, I have to exchange the fields mentioned above by "hard coding" the data exchange in my code... Thanks again! Roland