CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Bugs

RBF motion solver does not work well in parallel

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 7, 2011, 19:56
Default RBF motion solver does not work well in parallel
  #1
Senior Member
 
lakeat's Avatar
 
Daniel WEI (老魏)
Join Date: Mar 2009
Location: Beijing, China
Posts: 689
Blog Entries: 9
Rep Power: 21
lakeat is on a distinguished road
Send a message via Skype™ to lakeat
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
lakeat is offline   Reply With Quote

Old   December 2, 2011, 22:56
Default help of RBF example
  #2
New Member
 
Zhang Haijun
Join Date: Nov 2011
Posts: 4
Rep Power: 14
Haijun is on a distinguished road
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
Haijun is offline   Reply With Quote

Old   December 5, 2011, 09:53
Default
  #3
Senior Member
 
Elvis
Join Date: Mar 2009
Location: Sindelfingen, Germany
Posts: 620
Blog Entries: 6
Rep Power: 24
elvis will become famous soon enough
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
elvis is offline   Reply With Quote

Old   August 8, 2013, 06:50
Default
  #4
New Member
 
Join Date: Mar 2013
Posts: 17
Rep Power: 12
davidsblom is on a distinguished road
Has anyone found a solution for the third problem? I'm have the same issue.
Thanks alot!
davidsblom is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
IcePak network objects in parallel solver Alexey FLUENT 1 December 25, 2013 09:32
Problem of reconstructing pointVectorFields with parallel mesh motion (1.5.x) LESlie OpenFOAM 0 November 6, 2009 07:07
Fastest parallel solver for tridiagonal system Arpiruk Main CFD Forum 16 August 28, 2007 06:14
Which parallel solver is most suitable for my app? zonexo Main CFD Forum 1 November 17, 2006 10:46
direct parallel solver sylvain Main CFD Forum 2 June 25, 2001 08:56


All times are GMT -4. The time now is 03:12.