期刊
JOURNAL OF FLUID MECHANICS
卷 751, 期 -, 页码 142-163出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2014.294
关键词
aerodynamics; compressible boundary layers; compressible flows
资金
- National Science Foundation [CBET-0625015]
We examine the inviscid and boundary-layer approximations in fluids having bulk viscosities which are large compared with their shear viscosities for three-dimensional steady flows over rigid bodies. We examine the first-order corrections to the classical lowest-order inviscid and laminar boundary-layer flows using the method of matched asymptotic expansions. It is shown that the effects of large bulk viscosity are non-negligible when the ratio of bulk to shear viscosity is of the order of the square root of the Reynolds number. The first-order outer flow is seen to be rotational, non-isentropic and viscous but nevertheless slips at the inner boundary. First-order corrections to the boundary-layer flow include a variation of the thermodynamic pressure across the boundary layer and terms interpreted as heat sources in the energy equation. The latter results are a generalization and verification of the predictions of Emanuel
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