Computational thermoacoustics in fibrous media

A computational method for investigating the thermoacoustic properties of fibrous media has been developed that simulates the time-varying acoustic flow through the micro-geometry of fibrous material samples. The fibrous sample is represented in the simulation as an array of straight, cylindrical fi...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2009-10, Vol.126 (4_Supplement), p.2161-2161
Main Authors: Jensen, Carl, Raspet, Richard
Format: Article
Language:English
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Summary:A computational method for investigating the thermoacoustic properties of fibrous media has been developed that simulates the time-varying acoustic flow through the micro-geometry of fibrous material samples. The fibrous sample is represented in the simulation as an array of straight, cylindrical fibers, and a lattice Boltzmann based thermal fluid solver is used to calculate the response from an acoustic signal passing through the modeled geometry. It was found in development that the boundary conditions at solid surfaces must be represented to high accuracy as well as providing sufficient resolution to capture boundary layer effects near the walls and throughout the domain. These issues place limits on memory capacity that restricts the use of the method on samples of higher porosity. These issues will be discussed, and some results of the simulations will be presented.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.3248403