Numerical Simulation Study for the Effect of the Strength and theDirection of a Static Magnetic Field on the Transient Double-DiffusiveFlow in Liquid Phase during an Alloy Solidification

摘要

A numerical simulation study has been carried out to examine the effect of a staticmagnetic field on the solidification process of an alloy. A mathematical model, based on thecontinuum model, was developed for the computation of a transient double-diffusive fluid flowunder Lorentz body force. The model includes conservation of mass and momentum, heat, speciesand electrical charge balance equations. The simulation domain was selected as a cavity filled with ametallic alloy and differentially heated, which may be taken as a Bridgman model domain used inthe crystal growth process. The solution is carried out by using a Finite Volume Method. Study ofthe direction and the intensity of the applied magnetic field effects on stabilizing the doublediffusive flow field were also carried out. Simulation results indicate that the use of a static, E magnetic field in this growth setup is effective in suppressing natural convection in the solution.