NUMERICAL ANALYSIS OF BINARY SOLID-LIQUID PHASE CHANGE WITH BUOYANCY AND SURFACE TENSION DRIVEN CONVECTION
作者： F P. Incropera , A. H. H. Engel , W. D. Bennon
DOI: 10.1080/10407788908944724
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摘要: The effects of thermo/diffusocapillary convection on the solidification aqueous NH4Cl in a rectangular cavity have been simulated numerically using newly developed continuum model. Diffusocaptttary is negligible relative to thermocapillary convection, and for 20 × mm one-gravity environment, are most pronounced during early stages solidification, when flow conditions characterized by three major cells. One cell, driven solutal buoyancy forces, extends from mushy region melt separates top bottom cells primarily surface tension respectively. With increasing time, however, cell strengthens eventually envelops entire melt. In terms strength flow, liquidus front morphology, amount solid formed, final differ only slightly those predicted pure thermal/solutal convection.
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