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Flows with Density Variations and Compressibility: Similarities and Differences

  • Conference paper
IUTAM Symposium on Variable Density Low-Speed Turbulent Flows

Part of the book series: Fluid Mechanics and Its Applications ((FMIA,volume 41))

Abstract

Similarities and differences between low speed, variable density flows and compressible flows are discussed. To aid in this comparison, flows of a binary mixture of ideal gases are considered. Under appropriate conditions significant density variations can arise in such systems, with or without compressibility. For simplicity, chemical reactions are excluded from consideration. The effects of density fluctuations and compressibility are examined in the context of the averaged transport equations with emphasis on the physical processes occuring in the flow. The roles of pressure fluctuations, differential acceleration and baroclinic vorticity are highlighted. A synopsis of the behavior of the variable density mixing layer and its compressible counterpart is given. The need for experiments and numerical simulations specifically designed to yield fundamental information about the effects of density variations and compressibility is stressed.

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Authors and Affiliations

  1. Department of Aeronautics and Astronautics and Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305-4035, USA

    Sanjiva K. Lele

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  1. Sanjiva K. Lele
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Editors and Affiliations

  1. C.N.R.S., and Universités d’Aix-Marseille I and II, Marseille, France

    Louis Fulachier  & Fabien Anselmet  & 

  2. Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York, USA

    John L. Lumley

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Lele, S.K. (1997). Flows with Density Variations and Compressibility: Similarities and Differences. In: Fulachier, L., Lumley, J.L., Anselmet, F. (eds) IUTAM Symposium on Variable Density Low-Speed Turbulent Flows. Fluid Mechanics and Its Applications, vol 41. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5474-1_36

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  • DOI: https://doi.org/10.1007/978-94-011-5474-1_36

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-6302-9

  • Online ISBN: 978-94-011-5474-1

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