Dynamic Load Balancing for Coupled Simulation Methods

Matthias Meinke (), Ansgar Niemöller, Sohel Herff and Wolfgang Schröder
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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

A chapter in Sustained Simulation Performance 2019 and 2020, 2021, pp 61-84 from Springer

Abstract: 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.

Keywords: Dynamic load balancing; Aeroacoustics; Premixed combustion; Level Set; Cartesian meshes (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1007/978-3-030-68049-7_5

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