Abstract
Melting of ice in cylindrical capsules by natural and forced convections in outer region was studied by experiments including flow visualization technique and numerical calculations. When a cylinder diameter was small, natural convection melting was well simulated by axisymmetric heat conduction analysis. In case of a cylinder with large diameter, surface temperatures were affected by the effect of natural convection in a cylindrical, capsule. Melting time became smaller by the natural convection in the cylindrical capsule for natural convection melting. In case of forced convection melting, surface temperatures were considerably scattered and the stagnation temperature showed the highest value. The shape of the solid liquid boundary became asymmetric. Non-uniform distribution of heat transfer coefficient should be considered in treating melting with large size capsules.
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