Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20681
Title: Finite difference lattice boltzmann method applied to acoustic-scattering problems
Authors: Kam, EWS
So, RMC 
Fu, SC
Leung, RCK 
Issue Date: 2010
Publisher: American Institute of Aeronautics and Astronautics
Source: AIAA journal, 2010, v. 48, no. 2, p. 354-371 How to cite?
Journal: AIAA journal 
Abstract: This paper reports on an attempt to simulate acoustic waves scattering using a finite-difference lattice Boltzmann method based on an alternative lattice equilibrium particle distribution function constructed for compressible thermal fluids. The studies focus on acoustics scattering by a zero-circulation vortex and by an isolated thermal source with no heat gain/loss. Two limiting cases of each type of scattering are examined; one is the case of an incoming acoustic wave with a short wavelength, and the other has a relatively long wavelength compared with the characteristic dimension of the obstacle. These scattering problems have been treated previously using a conventional lattice Boltzmann method and a gas-kinetic scheme. The results showed that these methods were only able to simulate the short wavelength limit case with fair accuracy for the two types of acoustics scattering considered. Because the present approach is able to recover the compressible Navier-Stokes equations with correct fluid properties, the finite-difference solution of the proposed alternative modeled lattice Boltzmann equation allows the limiting cases of the acoustics scattering problems to be calculated without numerical instability. The results thus obtained are in agreement either with analysis or with results obtained from direct aeroacoustics simulations employing the compressible Navier-Stokes equations.
URI: http://hdl.handle.net/10397/20681
ISSN: 0001-1452
EISSN: 1533-385X
DOI: 10.2514/1.43753
Appears in Collections:Conference Paper

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

4
Last Week
0
Last month
0
Citations as of Nov 6, 2017

WEB OF SCIENCETM
Citations

3
Last Week
0
Last month
0
Citations as of Oct 24, 2017

Page view(s)

39
Last Week
2
Last month
Checked on Nov 20, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.