RBF motion solver does not work well in parallel

lakeat · January 7, 2011, 19:56

Dear all,

Happy New Year!

I found that the RBF motion solver does ot work very well in parallel.
Version: 1.6-ext

1. Since the solver needs movingIDs for interpolation, but this is not guaranteed after decomposition, some of the processors may not have the moving patches. Using manual decompose is a solution, but not a good solution.

2. Even if the moving patches' cells are decomposed into all the processors, isn't it a better idea to remain all the processors have the same controlPoints as based points for interpolation?

3. After forcing all the processors to have the same controlPoints, I still found another issue, don;t know how to solve it. That is after several deltaT runtime, some of the cell faces do not match with each other for different processors. Compared with differential based motion solver, I think it is bcoz the RBF motion solver is based on solving the pointsField, not volVectorField.

So what would be the best solution to correct the face mismatch. Or should the code be rewritten based on solving the volVectorField?

Thanks,

Haijun · December 2, 2011, 22:56

Hi Daniel
I am looking for RBF example in OF 1.6-ext. But so far I have not found the RBF example. I will be appreciated If you can give me a tutorial about RBF.
My mail is 'haijun0116@gmail.com'
Thank you in advance.

Haijun

elvis · December 5, 2011, 09:53

Hi,

are you sure that you tried to search in openfoam-extend?
http://openfoam-extend.git.sourcefor...ckRBF;h=36da3c

there are two versions of OpenFoam one by SGI/OpenCFD and one by Extend-community.

to get the "Extend-version"
mkdir ~/OpenFOAM
cd ~/OpenFOAM
git clone git://openfoam-extend.git.sourceforge.net/gitroot/openfoam-extend/OpenFOAM-1.6-ext

davidsblom · August 8, 2013, 06:50

Has anyone found a solution for the third problem? I'm have the same issue.
Thanks alot!

January 7, 2011, 19:56	RBF motion solver does not work well in parallel	#1
lakeat Senior Member Daniel WEI (老魏) Join Date: Mar 2009 Location: Beijing, China Posts: 689 Blog Entries: 9 Rep Power: 21	Dear all, Happy New Year! I found that the RBF motion solver does ot work very well in parallel. Version: 1.6-ext 1. Since the solver needs movingIDs for interpolation, but this is not guaranteed after decomposition, some of the processors may not have the moving patches. Using manual decompose is a solution, but not a good solution. 2. Even if the moving patches' cells are decomposed into all the processors, isn't it a better idea to remain all the processors have the same controlPoints as based points for interpolation? 3. After forcing all the processors to have the same controlPoints, I still found another issue, don;t know how to solve it. That is after several deltaT runtime, some of the cell faces do not match with each other for different processors. Compared with differential based motion solver, I think it is bcoz the RBF motion solver is based on solving the pointsField, not volVectorField. So what would be the best solution to correct the face mismatch. Or should the code be rewritten based on solving the volVectorField? Thanks, __________________ ~ Daniel WEI ------------- Boeing Research & Technology - China Beijing, China Email

December 2, 2011, 22:56	help of RBF example	#2
Haijun New Member Zhang Haijun Join Date: Nov 2011 Posts: 4 Rep Power: 14	Hi Daniel I am looking for RBF example in OF 1.6-ext. But so far I have not found the RBF example. I will be appreciated If you can give me a tutorial about RBF. My mail is 'haijun0116@gmail.com' Thank you in advance. Haijun

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December 5, 2011, 09:53		#3
elvis Senior Member Elvis Join Date: Mar 2009 Location: Sindelfingen, Germany Posts: 620 Blog Entries: 6 Rep Power: 24	Hi, are you sure that you tried to search in openfoam-extend? http://openfoam-extend.git.sourcefor...ckRBF;h=36da3c there are two versions of OpenFoam one by SGI/OpenCFD and one by Extend-community. to get the "Extend-version" mkdir ~/OpenFOAM cd ~/OpenFOAM git clone git://openfoam-extend.git.sourceforge.net/gitroot/openfoam-extend/OpenFOAM-1.6-ext

August 8, 2013, 06:50		#4
davidsblom New Member Join Date: Mar 2013 Posts: 17 Rep Power: 13	Has anyone found a solution for the third problem? I'm have the same issue. Thanks alot!