Physical modeling of vibrational convection in the Czochralski method
A novel technique of axial vibration control of the melt at Czochralski crystal growth was demonstrated. Axial vibrations introduced into the melt by oscillating disk submerged under the crystal. The experimental setup for physical modeling on water-glycerol mixtures was produced. It was demonstrated that stable symmetric vibro-convection flows could be obtained in the melt in the range of dynamic viscosity from 1 to 100 sP. Depending on mixture concentration and temperature profile the regimes at which a vector of the central melt flow changed its direction and became appropriate for crystal growth, were determined.