Rapid Solidification of a Liquid Layer on Work-piece Surface

• Main Author: 邱世欣
• Other Authors: 魏蓬生
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/60419188264033155958

碩士 === 國立中山大學 === 機械工程研究所 === 86 === 　　Unsteady, axisymmetric heat transfer in a liquid layer rapidly solidification on a cold substrate are investigate. The solidification is governed by an instantaneous nucleation temperature. 　　We used an enthalpy formulation to solve phase change problems. To account for a thermal diffusivity jump at the liquid-solid interface, a modified weight function scheme is developed(S.L Lee, 1989). By using a Cartesian coordinate system, the computer results show that the effects of the supercooling and nucleation temperature, Stefan number, cooling effect, recalescence and growth rates.