Abstract
Transient heat transfer and fluid flow driven by combined buoyancy and surface tension forces during melting of a metal from an isothermal vertical wall are modeled using an implicit moving grid technique. A stream function-vorticity-temperature formulation is employed in conjunction with body-fitted coordinates for mapping the irregular shape of the timewise changing solid-liquid interface. Results show that for augmenting buoyancy and surface tension forces, enhanced fluid velocities, heat transfer, and melting rates occur near the free surface. In contrast, for counteracting buoyancy and surface tension forces, heat transfer and melting rates near the free surface are reduced. The effect of these forces on the overall melting rate is, however, moderate for the Rayleigh (1.15 × 104) and Marangoni (0.0, −3.675 × 103, and 2.1 × 103) numbers considered.
Published Version
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