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Finite element simulation of sound propagation concerning meteorological conditions
Author(s) -
Nomura T.,
Takagi K.,
Sato S.
Publication year - 2010
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.2444
Subject(s) - partial differential equation , boundary value problem , mechanics , sound pressure , finite element method , particle velocity , acoustics , speed of sound , computational fluid dynamics , mathematical analysis , mathematics , physics , meteorology , thermodynamics
A finite element analysis method is investigated for the sound propagation problem in which meteorological conditions, such as wind or stratified atmospheric temperature distribution, are concerned. The basic equations are the coupled partial differential equation system in which the sound pressure and the fluid particle velocity are unknown variables. The quantities associated to the ambient atmospheric medium are assumed steady. Performance of the time integration methods are compared. The outgoing boundary condition and the impedance boundary conditions are introduced in the computational procedure. Vibrating thin flat plate as the sound source can be treated in terms of the fluid particle velocity on the plate surfaces. All these features are investigated through a number of numerical examples and the performances are satisfactory ones. Copyright © 2010 John Wiley & Sons, Ltd.