대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)
- 대한기계학회 2003년도 추계학술대회
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- Pages.139-144
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- 2003
굴곡의 표면을 가진 금속의 레이저 용융에 대한 열 및 유체유동 해석
An Analysis of Heat and Fluid Flow in the Laser Surface Melting with a Deformed Surface.
- 발행 : 2003.11.05
초록
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 melt 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.