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Published in:
Fundamental Equations of Acoustics Read chapter Read first chapter

2018 | OriginalPaper | Chapter

Direct Aeroacoustic Simulations Based on High Order Discontinuous Galerkin Schemes

Authors : Andrea Beck, Claus-Dieter Munz

Published in: Computational Acoustics

Publisher: Springer International Publishing

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Abstract

In this chapter, we discuss some of the challenges that arise for the direct numerical computation of noise generation and transport. Noise sources are associated with the non-linearities of the underlying hydrodynamics, i.e. with the turbulent fluctuations across the energy spectrum. Thus, the numerical resolution of these sound sources not only inherits the numerical difficulties that arise for general DNS and LES of turbulent flows, but the scale separation between the hydrodynamic velocity fluctuations and the radiated pressure waves adds additional challenges, for example in terms of boundary conditions and numerical approximation accuracy. Therefore, a highly efficient and accurate numerical scheme is necessary. The framework presented herein is based on a particular version of the Discontinuous Galerkin method, in which a nodal as well as discretely orthogonal basis is used for computational efficiency. This discretization choice allows arbitrary order in space while also supporting unstructured meshes. After discussing the details of the framework, examples of direct noise computation are presented, with a special focus on the numerical simulation of acoustic feedback in a complex automotive application.

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previous chapter Boundary Element Method for Time-Harmonic Acoustic Problems
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Footnotes
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Metadata
Title
Direct Aeroacoustic Simulations Based on High Order Discontinuous Galerkin Schemes
Authors
Andrea Beck
Claus-Dieter Munz
Copyright Year
2018
Book
Computational Acoustics

Print ISBN: 978-3-319-59037-0

Electronic ISBN: 978-3-319-59038-7

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-59038-7_4

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