발간논문

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Vol.29, No.1, 80 ~ 88, 1991
Title
Calculation and Application of heat flow in the Drop - Tube
함헌주H . J . Ham, 윤우영W . Y . Yoon, 강춘식C . S . Kang, 이진형J . H . Lee
Abstract
An effective technique for evaluating the effects of rapid solidificaton on the undercooling and crystallization behavior of high temperature materials is through containerless drop tube processing. Also solidification of metal can be performed under the microgravity environment, if the metal droplet is solidified during free fall. A laboratory scale (3m) drop tube has been developed and studied both of the effects on solidification behavior of metals. The free fall of a liquid metal drop and heat transfer from the drop to its inert gaseous environment are described. To analyze the undercooling history and quantitative microgravitational condition during drop tube processing, heat flow modelling has been developed and the model has been tested experimentally.
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