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In this work we study numerically the influence of a homogeneous electricalfield on the fluid and heat transfer phenomena at macroscale and mesoscaleduring unidirectional solidification of a binary metal alloy. The numericalresults showed that a pulse electric discharging applied perpendicularly to thesolidification front leads to a much stronger Joule heating of the liquid phasein comparison to the solid phase. It was found that on the mesoscopic scale theelectric current density is not homogeneous due to the complex shape of thedendrite and the difference between electrical conductivities of the solid andliquid phases. This inhomogeneity of the electrical current density in themushy zone leads to the increase of the Joule heating of the dendrite incomparison to the interdendritic liquid and induces a pinch force(electromagnetic Lorentz force). The main features of the resulting convectionin the interdendritic liquid are discussed.

Numerical study of the influence of an applied electrical potential on the solidification of a binary metal alloy