Effects of liquid superheat during solidification of pure metals in a square cavity |
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| Authors: | M A Rady V V Satyamurty Late A K Mohanty |
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| Institution: | Mech. Engg. Tech. Dept. Benha High Institute of Technology, Benha 13 512, Egypt, EG
Department of Mechanical Engineering, Indian Institute of Technology Kharagpur 721 302, India, IN
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| Abstract: | Numerical investigations on the effects of liquid superheat during solidification of a pure metal (tin) in a square cavity have been performed. Natural convection in the melt is established in a small time compared to the duration of solidification. At high degrees of superheat (ΔT sup>0.5) the average Nusselt number at the hot wall is practically invariant with time and is correlated by . Multi-cellular flow structure with peaks in the Nusselt number is predicted in the narrow melt for low values of ΔT sup. A modified superheat parameter, , suggested in the present study for the estimation of solidified volume has been found to be satisfactory. Correlations for the evolution of solid volume with time have been developed. |
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