Effects of curvature on hydrothermal waves instability of radial thermocapillary flows

Details Effects of curvature on hydrothermal waves instability of radial thermocapillary flows Effects of curvature on hydrothermal waves instability of radial thermocapillary flows

2003-01-14

arxiv.org/abs/physics/0301029v1

Comptes-rendus de l'Academie des Sciences 2001 2 (8) pp1227-1233 (2001)

Physics

Fluid Dynamics

2 figures, 10 pages (including a short version (2 pages) in french)

Scientific paper

The stability of a thermocapillary flow in an extended cylindrical geometry is analyzed. This flow occurs in a thin liquid layer with a disk shape when a radial temperature gradient is applied along the horizontal free surface. Besides the aspect ratio, a second parameter related to the local curvature is introduced to describe completely the geometrical effects. We recover classical hydrothermal waves as predicted by Smith and Davis but the properties of these waves are shown to evolve with the curvature parameter, thus leading to a non uniform pattern over the cell. Moreover, it is shown that the problem is not invariant with respect to the exchange of the hot and cold sides.

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