Influence d'une polarisation électrique sur l'instabilité d'une interface liquide/liquide

One studies the influence of the surface tension on the stability of a liquid electrolyte/liquid metal interface. The control of this parameter is obtained by an electric polarization imposed on the liquid metal. The flow is carried out in a cylindrical cavity with turning lid and fixed bottom on the level of which a annular drain filled with liquid gallium is set. One analyzes the phenomenon of appearance of the waves of instability according to the surface tension. The experimental results are compared with a Kelvin-Helmholtz model, purely non-viscous or corrected by taking into account the normal component of the viscous constraints. To cite this article: M. Al Radi et al., C. R. Mecanique 333 (2005).