Lateral freezing of an anisotropic porous medium saturated with an aqueous salt solution

摘要: Abstract Lateral freezing of a porous medium saturated with an aqueous salt solution was investigated experimentally and theoretically to obtain the improved understanding solute redistribution during solid/liquid phase change. The emphasis on interaction between hydrodynamics transport energy species in solidifying unsolidified regions effect flow characteristics possessed by matrix dendrite arrays. Freezing experiments were performed square cross-section enclosure chilled heated from side imposing uniform but different temperatures, filled artificial structure. latticed structure shadowgraph enabled visualization observation solidus liquidus positions. Simultaneous measurements local temperature liquid composition at selected locations also made. An analytical model based heat conservation relations diagram is suggested, predictions are compared experimental data. permeability examined over wide range parameters performing numerical experiments. affected offering additional resistance motion fluid migration separated crystals. amount macrosegregation found be mainly controlled direction gravity. Macrosegregation decreased when permeabilities and/or arrays decreased.