Multigrid

mlooti · April 18, 2016, 21:37

hi everybody

first of all i want to thank for this fabulous code, its well written and easy to work with

1.
is it possible to track the agglomeration procedure ? I mean I want to see the hierarchy of coarse meshes?

2.
does agglomeration uses cell-based or vertex-based strategy?

3.
does code use an specific library (like MGridGen) for agglomeration process or u hand coded an algorithm?

fpalacios · April 22, 2016, 02:00

Thanks,

There is a large community of developers behind SU2, and it is always great to know that we are doing something useful for the CFD community.

About your questions:

- He have worked a lot on the MG agglomeration algorithm, and still not really happy with the results in parallel model. Any help would be very appreciated.

The main subroutine for the agglomeration is
CMultiGridGeometry::CMultiGridGeometry(CGeometry ***geometry, CConfig **config_container, unsigned short iMesh, unsigned short iZone) : CGeometry() that you can find in geometry_structure.cpp

With GetParent or GetChildren, it is possible to relate the control volume at different levels.

The agglomeration use cell-based and it is only possible first order spacial approximation.

We have never explored a specific library... it seems a good idea, If you work on that, please keep us posted. As you know, the core of the open source are the contributions from the users community.

Anyway, we worked in the past in this area, some results are in

http://www.sciencedirect.com/science...45793016300214

Best Regards,
Francisco

April 18, 2016, 21:37	Multigrid	#1
mlooti Member Tom Join Date: Oct 2015 Posts: 67 Rep Power: 10	hi everybody first of all i want to thank for this fabulous code, its well written and easy to work with 1. is it possible to track the agglomeration procedure ? I mean I want to see the hierarchy of coarse meshes? 2. does agglomeration uses cell-based or vertex-based strategy? 3. does code use an specific library (like MGridGen) for agglomeration process or u hand coded an algorithm?

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April 22, 2016, 02:00		#2
fpalacios Super Moderator Francisco Palacios Join Date: Jan 2013 Location: Long Beach, CA Posts: 404 Rep Power: 15	Thanks, There is a large community of developers behind SU2, and it is always great to know that we are doing something useful for the CFD community. About your questions: - He have worked a lot on the MG agglomeration algorithm, and still not really happy with the results in parallel model. Any help would be very appreciated. The main subroutine for the agglomeration is CMultiGridGeometry::CMultiGridGeometry(CGeometry *geometry, CConfig config_container, unsigned short iMesh, unsigned short iZone) : CGeometry() that you can find in geometry_structure.cpp With GetParent or GetChildren, it is possible to relate the control volume at different levels. The agglomeration use cell-based and it is only possible first order spacial approximation. We have never explored a specific library... it seems a good idea, If you work on that, please keep us posted. As you know, the core of the open source are the contributions from the users community. Anyway, we worked in the past in this area, some results are in http://www.sciencedirect.com/science...45793016300214 Best Regards, Francisco