Journal of Environment and Engineering
Online ISSN : 1880-988X
ISSN-L : 1880-988X
Papers
Simultaneous Measurements of Velocity and Scalar Fields in a Turbulent Jet Using PIV and LIF
Hiroshi KAWANABEChihiro KONDOSeiya KOHORIMasahiro SHIOJI
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ジャーナル フリー

2010 年 5 巻 2 号 p. 231-239

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抄録
Distributions of velocity and concentration of turbulent gas jets, ranging from helium to carbon dioxide, with various densities with respect to ambient air are measured using particle image velocimetry and laser-induced fluorescence methods. The turbulent transport of the nozzle fluid is directly investigated to analyze the distributions of nozzle-fluid concentration and its vortex motion. The results indicate that self-similarity exists between profiles of scalar flux and Reynolds stress along the radial direction. Furthermore, several sub-grid scale scalar-flux models for large eddy simulation are discussed. Based on the scattering plots of the model values of sub-grid scale scalar flux with respect to the measured values, the characteristics of each model are similar for all of the density conditions. In addition, the Favre-averaged scale similarity model performs well for a wide range of densities.
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© 2010 by The Japan Society of Mechanical Engineers
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