THERMOCAPILLARY MOBILITY OF A SUSPENSION OF DROPLETS IN A FLUID

The effective thermocapillary mobility of a suspension of viscous, hea t conducting droplets in a fluid of different shear viscosity and ther mal conductivity is studied in the framework of the theory of linear t ransport coefficients of heterogeneous media. The fluid velocity and t he temperature field are combined conveniently into a single four-vect or field. This allows a multiple scattering analysis and calculation o f the thermocapillary mobility in terms of a renormalized cluster expa nsion. A mean field result is derived that reduces to the Clausius-Mos sotti formula in the case of bubbles. Correlation corrections are calc ulated in pair approximation. (C) 1996 American Institute of Physics.