The -parallel parameter of mapFields utility in OpenFOAM v2.3.0

shuoxue · April 15, 2014, 07:44

I performed a case which time ranged from 0s to 200s with sparse grid(192000 cells) on 4 processors.

Then, a geometry with better grid(576000 cells) and same BCs was established.

Code:

mapFields -consistent <dir>

required so much time, I'd like to execute mapFields with parallel mode.

Code:

mapFields -consistent <dir> -parallel

or

Code:

mpirun -np 4 mapFields -consistent <dir> -parallel

have been tried and failed.

Is there someone knows how to speed up mapFields with parallel mode?

My OpenFOAM is 2.3.0.

Thanks in advance.

shoxue

olivierG · April 28, 2014, 06:59

hello,
There is a lot of change in the mapFields for 2.3. (and we lost the ability to map from single to parallel case and the opposite).
If you want to keep the old map method (faster), use option "-mapMethod mapNearest".
But for me there is a regression with mapField, so i use the 2.2 version for this tools.

regards,
olivier

April 15, 2014, 07:44	The -parallel parameter of mapFields utility in OpenFOAM v2.3.0	#1
shuoxue Member Yao Lu Join Date: May 2013 Posts: 33 Rep Power: 13	I performed a case which time ranged from 0s to 200s with sparse grid(192000 cells) on 4 processors. Then, a geometry with better grid(576000 cells) and same BCs was established. Code: mapFields -consistent <dir> required so much time, I'd like to execute mapFields with parallel mode. Code: mapFields -consistent <dir> -parallel or Code: mpirun -np 4 mapFields -consistent <dir> -parallel have been tried and failed. Is there someone knows how to speed up mapFields with parallel mode? My OpenFOAM is 2.3.0. Thanks in advance. shoxue

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April 28, 2014, 06:59		#2
olivierG Senior Member Olivier Join Date: Jun 2009 Location: France, grenoble Posts: 272 Rep Power: 18	hello, There is a lot of change in the mapFields for 2.3. (and we lost the ability to map from single to parallel case and the opposite). If you want to keep the old map method (faster), use option "-mapMethod mapNearest". But for me there is a regression with mapField, so i use the 2.2 version for this tools. regards, olivier