decomposePar - view how mesh is divided up

ConorMD · June 1, 2020, 15:25

Hi Guys,

Can anyone tell me if it is possible to view how the mesh is partitioned after using decomposePar? I am using the scotch function.

I know that the points and neighbor patch info are divided into their respective processor files. Is it possible to visualize the decomposition?

Kind regards,
Conor

geth03 · June 2, 2020, 05:46

yes,
after decomposing, open your .foam-file with paraview.
for case type, under properties, select: decomposed case.

you should be able to see boundaries in your internal mesh.

guin · June 2, 2020, 11:15

Quote:

Originally Posted by geth03

yes,
after decomposing, open your .foam-file with paraview.
for case type, under properties, select: decomposed case.

you should be able to see boundaries in your internal mesh.

Right, then you can either reduce the opacity a little bit or just show the geometry as "wireframe".

fumiya · June 6, 2020, 05:52

You can use processorField function object to visually check how your mesh is decomposed.
https://www.openfoam.com/documentati...d.html#details

Best regards,
Fumiya

HPE · June 6, 2020, 08:29

I think the following link is more appropriate for a user guide: https://www.openfoam.com/documentati...ssorField.html (the above is the API guide).

PS: By the way, I am one your followers who were trying to promote your page (can find your surname below)

.

fumiya · June 6, 2020, 09:31

Hi HPE,

Thank you for your correction and the link to my blog!

Best regards,
Fumiya

olesen · June 26, 2020, 12:32

decomposePar -cellDist -dry-run
if my memory serves me.
Should be fast, since it only writes the cell distribution (as a serial field) but doesn't write the processor files.

June 1, 2020, 15:25	decomposePar - view how mesh is divided up	#1
ConorMD New Member Conor Join Date: Oct 2016 Posts: 14 Rep Power: 9	Hi Guys, Can anyone tell me if it is possible to view how the mesh is partitioned after using decomposePar? I am using the scotch function. I know that the points and neighbor patch info are divided into their respective processor files. Is it possible to visualize the decomposition? Kind regards, Conor

June 6, 2020, 05:52	processorField function object	#4
fumiya Senior Member Fumiya Nozaki Join Date: Jun 2010 Location: Yokohama, Japan Posts: 266 Blog Entries: 1 Rep Power: 18	You can use processorField function object to visually check how your mesh is decomposed. https://www.openfoam.com/documentati...d.html#details Best regards, Fumiya Ship Designer and ET3 like this. __________________ [Personal] Blog: https://caefn.com/ Twitter: https://twitter.com/FumiyaNozaki SlideShare: http://www.slideshare.net/fumiyanozaki96

June 6, 2020, 08:29		#5
HPE Senior Member Herpes Free Engineer Join Date: Sep 2019 Location: The Home Under The Ground with the Lost Boys Posts: 932 Rep Power: 12	I think the following link is more appropriate for a user guide: https://www.openfoam.com/documentati...ssorField.html (the above is the API guide). PS: By the way, I am one your followers who were trying to promote your page (can find your surname below) . fumiya likes this. __________________ The OpenFOAM community is the biggest contributor to OpenFOAM: User guide/Wiki-1/Wiki-2/Code guide/Code Wiki/Journal Nilsson/Guerrero/Holzinger/Holzmann/Nagy/Santos/Nozaki/Jasak/Primer Governance Bugs/Features: OpenFOAM (ESI-OpenCFD-Trademark) Bugs/Features: FOAM-Extend (Wikki-FSB) Bugs: OpenFOAM.org How to create a MWE New: Forkable OpenFOAM mirror

June 6, 2020, 09:31		#6
fumiya Senior Member Fumiya Nozaki Join Date: Jun 2010 Location: Yokohama, Japan Posts: 266 Blog Entries: 1 Rep Power: 18	Hi HPE, Thank you for your correction and the link to my blog! Best regards, Fumiya __________________ [Personal] Blog: https://caefn.com/ Twitter: https://twitter.com/FumiyaNozaki SlideShare: http://www.slideshare.net/fumiyanozaki96

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June 2, 2020, 05:46		#2
geth03 Senior Member Join Date: Dec 2019 Location: Cologne, Germany Posts: 355 Rep Power: 8	yes, after decomposing, open your .foam-file with paraview. for case type, under properties, select: decomposed case. you should be able to see boundaries in your internal mesh.

June 26, 2020, 12:32		#7
olesen Senior Member Mark Olesen Join Date: Mar 2009 Location: https://olesenm.github.io/ Posts: 1,686 Rep Power: 40	decomposePar -cellDist -dry-run if my memory serves me. Should be fast, since it only writes the cell distribution (as a serial field) but doesn't write the processor files.