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Numerical analysis of gas-particle two-phase flows

Published online by Cambridge University Press:  26 April 2006

R. Ishii ,
Y. Umeda  and
M. Yuhi
R. Ishii
Affiliation:
Department of Aeronautics, Kyoto University, Kyoto 606, Japan
Y. Umeda
Affiliation:
Department of Aeronautics, Kyoto University, Kyoto 606, Japan
M. Yuhi
Affiliation:
Department of Aeronautics, Kyoto University, Kyoto 606, Japan
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Abstract

This paper is concerned with a numerical analysis of axisymmetric gas-particle two-phase flows. Underexpanded supersonic free-jet flows and supersonic flows around a truncated cylinder of gas-particle mixtures are solved numerically on the super computer Fujitsu VP-400. The gas phase is treated as a continuum medium, and the particle phase is treated partly as a discrete one. The particle cloud is divided into a large number of small clouds. In each cloud, the particles are approximated to have the same velocity and temperature. The particle flow field is obtained by following these individual clouds separately in the whole computational domain. In estimating the momentum and heat transfer rates from the particle phase to the gas phase, the contributions from these clouds are averaged over some volume whose characteristic length is small compared with the characteristic length of the flow field but large compared with that of the clouds. The results so obtained reveal that the flow characteristics of the gas-particle mixtures are widely different from those of the dust-free gas at many points.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 203 , June 1989 , pp. 475 - 515
Copyright
© 1989 Cambridge University Press

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