Numerical Modelling of Velocity and Temperature Distributions of the Buoyancy Convection Effect in KNbO3 Melt

Numerical Modelling of velocity and temperature fields in high-temperature KNbO3 melt of a loop-shaped Pt wire heater is carried out by using the commercial computational code ANSYS for the mathematical solution of the governing equations.Based on the experimental boundary conditions and the Boussinesq approximation,the numerical modelling of a steady and two-dimensional model is applied to study the process under consideration of the buoyancy-driven convection condition.The result is compared with the previous experimental and theoretical data obtained in our laboratory,and the former is in agreement with the latter.Thus a theoretical guide for reasonable growth conditions is provided by studying in depth the real fluid flow effects in the crystal growth from the melt.