Investigating the Scalability of OpenFOAM for the Solution of Transport Equations and Large Eddy Simulations

  • Orlando Rivera
  • Karl Fürlinger
  • Dieter Kranzlmüller
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7017)


OpenFOAM is a mainstream open-source framework for flexible simulation in several areas of CFD and engineering whose syntax is a high level representation of the mathematical notation of physical models. We use the backward-facing step geometry with Large Eddy Simulations (LES) and semi-implicit methods to investigate the scalability and important MPI characteristics of OpenFOAM. We find that the master-slave strategy introduces an unexpected bottleneck in the communication of scalar values when more than a hundred MPI tasks are employed. An extensive analysis reveals that this anomaly is present only in a few MPI tasks but results in a severe overall performance reduction. The analysis work in this paper is performed with the tool IPM, a portable profiling and workload characterization tool for MPI programs.


Computational Fluid Dynamics Large Eddy Simulation Domain Decomposition Cell Mesh Wall Time 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Orlando Rivera
    • 1
  • Karl Fürlinger
    • 2
  • Dieter Kranzlmüller
    • 1
    • 2
  1. 1.Leibniz Supercomputing Centre (LRZ)MunichGermany
  2. 2.MNM-TeamLudwig-Maximilians-Universität (LMU)MunichGermany

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