Use of multiple cores but without domain decomposition -- CFD Online Discussion Forums

November 30, 2023, 09:28	Use of multiple cores but without domain decomposition	#1
PetrosLazaris New Member Petros Lazaris Join Date: Dec 2020 Posts: 6 Rep Power: 5	Hallo everyone. I would like to ask a question about OpenFoam. I want to use multiple cores to speed up my runs on complicated cases,but I do not want to use domain decomposition. I have used the utility of the form "mpirun -np 3 icoFoam -parallel" without decompsosing the domain, but the run takes longer than using a single core. Is there any way to effectively use multiple cores without domain decomposition ?

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