Free access article

ESAIM: Proc., 1999, Vol. 7, pp. 359-368
DOI: 10.1051/proc:1999033

Numerical simulation of a variable-density mixing-layer

J. Reinaud, L. Joly and P. Chassaing

ENSICA 1, Place Emile Blouin Toulouse, France

Abstract
The development of a baroclinic secondary instability over the primary Kelvin-Helmholtz roll-up of a two-dimensional, variable-density mixing-layer is discussed. A particular attention is paid to the accuracy of the simulations by investigating the conservation of an invariant of the flow. Then, the influence of both the spatial and the temporal resolution on the development of the secondary instability is studied. It is concluded that the variable-density layer exhibits a strongly unstable region where vorticity has been intensified by the local acceleration coupled with the density stratification.

© EDP Sciences, ESAIM 1999

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