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Towards a monotonicity-preserving inviscid wall boundary condition for aeroacoustics

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conference contribution
posted on 24.02.2016, 11:29 by I. Spisso, Aldo Rona, M. Georgoulis
This paper presents an extension of the Tam and Dong solid wall boundary condition that combines the established non-penetration physical condition with a further restriction on the wall-normal velocity gradient. This results in a wall boundary condition in the form of a second-order partial differential equation which is satisfied analytically by fully reflecting acoustic waves and is monotonicity preserving in problems with a dominant near-boundary acoustic pressure distribution. With the extended wall boundary condition discretized to second-order spatial accuracy, tests on the wall reflection of a two-dimensional Gaussian pulse show that this condition suppresses the high wavenumber spurious numerical waves from the more conventional v = 0 formulation. This result is obtained using a compact finite-difference time-marching scheme that is sixth-order accurate in space and fourth-order accurate in time without the use of high-order filters applied to the computational domain interior. Copyright © 2009 by A. Rona.

History

Citation

15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference), 2009

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering

Source

15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference), 2009, Miami, Florida

Version

AM (Accepted Manuscript)

Published in

15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference)

Publisher

American Institute of Aeronautics and Astronautics (AIAA)

isbn

9781563479748;978-1-60086-967-9

Copyright date

2009

Available date

24/02/2016

Publisher version

http://arc.aiaa.org/doi/abs/10.2514/6.2009-3179

Language

en

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