Linear stability of differentially heated developing layers


Journal Article

Heterogeneous shear layers, characterized by the presence of a wake deficit and a Gaussian temperature profile, are considered. Unstable mode characteristics are interpreted in terms of a five-parameter set which describes the velocity ratio and the thicknesses and strengths of the wake component and temperature spike. In the absence of a wake deficit, the Kelvin-Helmholtz mode is inhibited as density gradients increase. Stabilization of this mode is weak (strong) when the density profile thickness is larger (smaller) than that of the shear layer. When a wake component is present, stabilization of the Kelvin-Helmholtz instability is no longer observed. In this case, the growth rate of unstable Kelvin-Helmholtz waves is found to be weakly sensitive to the presence of a heated region and to the details of the wake deficit. © 1995, American Institute of Aeronautics and Astronautics, Inc., All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Knio, OM; Shi, X

Published Date

  • January 1, 1995

Published In

Volume / Issue

  • 33 / 5

Start / End Page

  • 822 - 832

International Standard Serial Number (ISSN)

  • 0001-1452

Digital Object Identifier (DOI)

  • 10.2514/3.12650

Citation Source

  • Scopus