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http://dx.doi.org/10.3795/KSME-B.2005.29.1.001

An Analysis of Heat and Fluid Flow in the Laser Surface Melting with a Deformed Surface  

Kim, Young-Deuk (한양대학교 대학원 기계공학과)
Sim, Bok-Cheol (LG 실트론, 웨이퍼 연구소, 결정성장연구팀)
Kim, Woo-Seung (한양대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.29, no.1, 2005 , pp. 1-8 More about this Journal
Abstract
Laser melting problems with deformed substrates are investigated by axisymmetric numerical simulations. Source-based method is used to solve the energy equation, and the momentum equations are solved in the liquid domain with SIMPLER algorithm. Using a laser beam with a top-hat heat flux distribution, this study is performed to examine the effect of surface deformation, beam power density and surface tension force on the molten pool during laser melting. Surface temperature decreases with increasing surface deformation, while surface velocity increases. It is found that surface deformation, beam power density and surface tension force have a very significant effect on heat transfer and fluid flow during laser melting.
Keywords
Laser Melting; Thermocapillary Convection; Deformed-Surface;
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