ask about decomposition

NEET · December 1, 2011, 17:01

Hi, I'm new to OpenFOAM. Now i am learning about the parallel processing in OpenFOAM and I have some questions about the decomposePar utility.

1. How much i can do with this utility. Can i divide a rectangular into 4 layers; processor0 runs for 1st and 3rd layers and processor1 runs for 2nd and 4th layers?

2. After the geometry is divided, is that possible to run the sub domains separately? May be only 3 of 4 sub domains is running?

Thanks.

NEET

Rickard.Solsjo · December 7, 2011, 11:35

Dont think so, anyway, how can you run a case for two of the layers and not the other two? You still need to solve the transport equations

Bernhard · December 7, 2011, 13:57

1. Probably this is possible with the manual decomposition, but I cannot think of any reason that you want this?

2. If you use only half of your domain, then the case is totally different. You can however create a subsetMesh wish does effectively what you want here.

December 1, 2011, 17:01	ask about decomposition	#1
NEET New Member Ang Yen Kee Join Date: Nov 2011 Posts: 3 Rep Power: 15	Hi, I'm new to OpenFOAM. Now i am learning about the parallel processing in OpenFOAM and I have some questions about the decomposePar utility. 1. How much i can do with this utility. Can i divide a rectangular into 4 layers; processor0 runs for 1st and 3rd layers and processor1 runs for 2nd and 4th layers? 2. After the geometry is divided, is that possible to run the sub domains separately? May be only 3 of 4 sub domains is running? Thanks. NEET

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December 7, 2011, 11:35		#2
Rickard.Solsjo Senior Member Rickard Join Date: May 2010 Location: Lund, Skåne, Sweden Posts: 143 Rep Power: 16	Dont think so, anyway, how can you run a case for two of the layers and not the other two? You still need to solve the transport equations

December 7, 2011, 13:57		#3
Bernhard Senior Member Bernhard Join Date: Sep 2009 Location: Delft Posts: 790 Rep Power: 22	1. Probably this is possible with the manual decomposition, but I cannot think of any reason that you want this? 2. If you use only half of your domain, then the case is totally different. You can however create a subsetMesh wish does effectively what you want here.