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Dynamic Load Balancing for Coupled Simulation Methods

In: Sustained Simulation Performance 2019 and 2020

Author

Listed:
  • Matthias Meinke

    (RWTH Aachen University, Institute of Aerodynamics)

  • Ansgar Niemöller

    (RWTH Aachen University, Institute of Aerodynamics)

  • Sohel Herff

    (RWTH Aachen University, Institute of Aerodynamics)

  • Wolfgang Schröder

    (RWTH Aachen University, Institute of Aerodynamics
    RWTH Aachen University, JARA Center for Simulation and Data Science)

Abstract

A dynamic load balancing technique for simulation methods based on hierarchical Cartesian meshes is presented for two applications in this paper. The first method is a hybrid CFD/CAA solver for the prediction of aeroacoustic noise. In this application, a finite-volume method for the large eddy simulation of the turbulent flow field is coupled to a discontinuous Galerkin method for the solution of the acoustic perturbation equations to predict the generation and propagation of the sound field. The second simulation method predicts a combustion process of a premixed fuel. The turbulent flow field is predicted again by large eddy simulation using the finite-volume method, which is coupled to a level-set solver used for the prediction of the flame surface. In both applications, a joint Cartesian mesh is used for the involved solvers, which allows to efficiently redistribute the computational load using a space filling curve. The results show that the dynamic load balancing can enhance the parallel efficiency even for static meshes. The simulation of the combustion process with a solution adaptvie mesh technique demonstrates the necessity of a dynamic load balancing technique.

Suggested Citation

  • Matthias Meinke & Ansgar Niemöller & Sohel Herff & Wolfgang Schröder, 2021. "Dynamic Load Balancing for Coupled Simulation Methods," Springer Books, in: Michael M. Resch & Manuela Wossough & Wolfgang Bez & Erich Focht & Hiroaki Kobayashi (ed.), Sustained Simulation Performance 2019 and 2020, pages 61-84, Springer.
    • Handle: RePEc:spr:sprchp:978-3-030-68049-7_5
    DOI: 10.1007/978-3-030-68049-7_5
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