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The Effects of Thermosolutal Convection on Macrosegregation during Alloy Solidification
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 Title & Authors
The Effects of Thermosolutal Convection on Macrosegregation during Alloy Solidification
Lee, Gyun-Ho; Mok, Jin-Ho; Lee, Jin-Ho;
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 Abstract
Numerical investigation is made to study the effects of thermosolutal convection on the formation of macrosegregation in a Pb-Sn alloy solidification process in a two dimensional confined rectangluar mold. The basic equations are sovled using the Contrinum Model theory with the SIMPE algorithm during the solidification process. In addition, to track the liquid-solid interface with time variations, the moving boundary condition was adopted and moving irregular interface shapes were treated with the time-dependent, boundary-fitted coordinate system. As the temperature reduces from the liquidus to the solidus, the liquid concentration of Sn, the lighter constituent, increases. Then the buoyancy-driven flow due to temperature and liquid composition gradients occurs in the mushy region and forms the complicated macrosegregation maps. belated to this phenomena, effects on the macrosegregation formation depending on the cooling condition and gravity values are examined.
 Keywords
Alloy Solidification;Macrosegregation;Continuum Model;SIMPLE Algorithm;Thermosolutal Convection;Gravitational Effect;
 Language
Korean
 Cited by
1.
합금응고과정에서 이중확산대류가 거시편석에 미치는 영향,이균호;목진호;이진호;

대한기계학회논문집B, 2001. vol.25. 10, pp.1337-1345 crossref(new window)
2.
원통좌표를 이용한 주조공정의 수치해석모델 개발,목진호;박성준;이진호;

대한기계학회논문집B, 2004. vol.28. 4, pp.433-440 crossref(new window)
3.
A Study on Development of the Three-Dimensional Numerical Model to Analyze the Casting Process: Mold Filling and Solidification,;

Journal of Mechanical Science and Technology, 2005. vol.19. 7, pp.1488-1502
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