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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Characteristics of traveling plumes generated within a double-diffusive interface between counter shear flows

Get access (open in a dialog) DOI: 10.1615/IHTC12.1990
6 pages

Resumo

A two-layer, salt-stratified system destabilized and mixed by lateral heating and cooling is considered. We focus our attention on the quasi-steady process before the mixing process and the structure of a diffusive interface separating convective layers, under various experimental conditions. The laser induced fluorescence technique exhibits that three dimensional time-periodic plumes travel along the upper and lower parts of the interface in a reverse sense, respectively, and they are aligned in the spanwaise direction with a constant spacing, which induces the fluctuations of the temperature and concentration species. It is found that the dimensionless period of oscillation is inversely proportional to the 0.5 power of the thermal Rayleigh number, which is supported by a simple diffusion model within the interface.