Effect of nonstationary regimes of the natural and mixed convection of melts on heat transfer and the forms of crystallization fronts in the Czochralski method

Abstract

Regimes of the natural and mixed convection of melts with Prandtl numbers ten and 16 are studied experimentally and numerically. The evolution of spatial shape of flow as the Reynolds number rises is studied, as is that of heat transfer on the crystallization front at fixed values of the Grashof and Marangoni numbers, relative to the crystal radius. The boundaries of transitions to nonstationary flow regimes are determined.