✦ LIBER ✦

Lattice Boltzmann simulations of impedance tube flows

✍ Scribed by A. Toutant; P. Sagaut

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 458 KB
Volume: 38
Category: Article
ISSN: 0045-7930
DOI: 10.1016/j.compfluid.2008.05.006

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✦ Synopsis

Using this boundary condition that links the normal velocity and the pressure, the basic idea consists in calculating the Lattice Boltzmann populations at a boundary node thanks to the gradients of the fluid velocity. This paper describes the proposed LBM boundary conditions and its assessment on the NASA Langley flow-impedance tube with a constant depth ceramic tubular liner. We performed both single and broadband-frequency simulations, without mean flow and with sheared mean flows. Excellent agreement is shown with both experimental data and other simulation results at various frequencies up to a Mach number equal to 0.5.

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