Abstract

Thermocapillary Convection (TC) has been experimentally studied with an oxide melt of size and configuration typical for crystal growth. The streamlines and the flow velocities of TC have been visualized and measured. TC dominates the fluid flow in a layer of some mm thickness near the free melt surface. TC has been identified to be a significant flow phenomenon for heat and mass transport in Czochralski growth of oxide crystals because large temperature gradients along the free melt surface occur in this technique.

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