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Vortical flow in thermo‐acoustic devices
Author(s) -
Ishigaki Masahiro,
Kuzuu Kazuto,
Adachi Shizuko,
Ishii Katsuya
Publication year - 2007
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200701012
Subject(s) - tube (container) , oscillation (cell signaling) , mechanics , amplitude , compressibility , flow (mathematics) , physics , thermodynamics , boundary layer , temperature gradient , materials science , chemistry , optics , meteorology , composite material , biochemistry
Taconis oscillation in a closed long tube with large thermal gradient is studied by numerical calculation of the 2D compressible Navier‐Stokes equations. The both ends of tube are hot ( T = T H ), and the center of side wall is cold ( T = T C ). We analyze the pressure amplitude p amp and the time averaged temperature T m in the closed tube. p amp is almost homogenous in the tube cross section, however, T m is not homogenous in the central cold region. We also observe two steady states at the same temperature ratio θ = T H / T C . It is important to analyze the effects of the boundary layer in this cold region on Taconis oscillations. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)