Treffer: Calculation of sound generation and radiation from instationary flows

Title:
Calculation of sound generation and radiation from instationary flows
Authors:
WILDE, Andreas
Source:
Proceedings of the First International Conference for Mesoscopic Methods in Engineering and Science (ICMMES), Braunschweig, Germany, July 25-30, 2004Computers & fluids. 35(8-9):986-993
Publisher Information:
Oxford: Elsevier Science, 2006.
Publication Year:
2006
Physical Description:
print, 18 ref
Original Material:
INIST-CNRS
Subject Terms:
Mechanics acoustics, Mécanique et acoustique, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Domaines classiques de la physique (y compris les applications), Fundamental areas of phenomenology (including applications), Acoustique, Acoustics, Aéroacoustique et acoustique atmosphérique, Aeroacoustics, atmospheric sound, Mécanique des fluides, Fluid dynamics, Méthodes de calcul en mécanique des fluides, Computational methods in fluid dynamics, Aeroacoustics and atmospheric sound, Aéroacoustique, Aeroacoustics, Ecoulement subsonique, Subsonic flow, Equation Boltzmann, Boltzmann equation, Incidence rasante, Grazing incidence, Incidencia rasante, Interaction, Interactions, Modèle réticulaire, Lattice model, Modelo reticular, Modélisation, Modelling, Mécanique fluide numérique, Computational fluid dynamics, Plaque plane, Flat plate, Placa plana, Résonateur Helmholtz, Helmholtz resonator, Resonador Helmholtz, Simulation numérique, Digital simulation, Système mésoscopique, Mesoscopic systems
Document Type:
Konferenz Conference Paper
File Description:
text
Language:
English
Author Affiliations:
Fraunhofer Institut für Integrierte Schaltungen, Auβenstelle EAS Zeunerstr. 38, 01069 Dresden, Germany
ISSN:
0045-7930
Access URL:
http://pascal-francis.inist.fr/vibad/index.php?action=search&terms=17868496
Rights:
Copyright 2006 INIST-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Notes:
Physics: acoustics

Physics: fluid mechanics
Accession Number:
edscal.17868496
Database:
PASCAL Archive

Weitere Informationen

The Lattice-Boltzmann method (LBM) for simulation of low Mach number flows is evaluated for the application in flow acoustics. By linearization and von-Neumann analysis quantitative measures for the accuracy of phase speed and attenuation of low amplitude sound waves in presence of a mean flow are derived. It is shown that only phase errors are relevant when simulating sound waves in the audible frequency range in air. For the two dimensional 9 bit model and the three dimensional 19 bit model the phase speed error is below 0.1% (1%) as long as the wave is resolved with at least 34 (12) points per wavelength. The LBM is applied to the problem of a Helmholtz resonator under a grazing flow and to the trailing edge noise generation problem. The results clearly demonstrate the ability to reproduce relevant flow acoustic effects.