Parallel collision algorithm

stephan · October 31, 2006, 11:43

Dear All,

i want to write a parallel version of a collisionmodel in libdieselspray.
Unfortunatly i cant find the point (in liblagrangian) where the global particlelist is splitted into smaller ones for each processor.
can anybody give me some hints how the parallel-tracking works.
any help would be appreciated
stephan

gschaider · November 1, 2006, 17:44

Hi Stephan!

As I understand it each processor administrates the particles in his mesh regions. If the particles leaves his sub-mesh he hands it over to the other processor (who's mesh he enters). So there is no need for splitting. But you might have a look at decomposePar - that should split the list.

stephan · November 2, 2006, 08:14

Hi Bernhard,

at first : thanks for your help!
i already looked through the decompose-files and i think i found what i need. (of course understanding is something different..)
i want to implement an soft sphere modell with a spring-dashpot-slider element. so i look for opportunities to have particle-collisions in the near or at a processor-boundary, which is not possibel right now.

another thing: i am working in berlin and would be interested in some knowledge exchange if you are interested too?
what kind of problems your are working on?

stephan

October 31, 2006, 11:43	Dear All, i want to write a	#1
stephan Senior Member Stephan Gerber Join Date: Mar 2009 Location: Germany Posts: 118 Rep Power: 17	Dear All, i want to write a parallel version of a collisionmodel in libdieselspray. Unfortunatly i cant find the point (in liblagrangian) where the global particlelist is splitted into smaller ones for each processor. can anybody give me some hints how the parallel-tracking works. any help would be appreciated stephan

November 1, 2006, 17:44	Hi Stephan! As I understand	#2
gschaider Assistant Moderator Bernhard Gschaider Join Date: Mar 2009 Posts: 4,225 Rep Power: 51	Hi Stephan! As I understand it each processor administrates the particles in his mesh regions. If the particles leaves his sub-mesh he hands it over to the other processor (who's mesh he enters). So there is no need for splitting. But you might have a look at decomposePar - that should split the list. __________________ Note: I don't use "Friend"-feature on this forum out of principle. Ah. And by the way: I'm not on Facebook either. So don't be offended if I don't accept your invitation/friend request

November 2, 2006, 08:14	Hi Bernhard, at first : tha	#3
stephan Senior Member Stephan Gerber Join Date: Mar 2009 Location: Germany Posts: 118 Rep Power: 17	Hi Bernhard, at first : thanks for your help! i already looked through the decompose-files and i think i found what i need. (of course understanding is something different..) i want to implement an soft sphere modell with a spring-dashpot-slider element. so i look for opportunities to have particle-collisions in the near or at a processor-boundary, which is not possibel right now. another thing: i am working in berlin and would be interested in some knowledge exchange if you are interested too? what kind of problems your are working on? stephan

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