STUDY OF THERMAL BEHAVIOR AND FLUID FLOW DURING LASER SURFACE HEATING OF ALLOYS
- 1 November 1997
- journal article
- research article
- Published by Taylor & Francis in Numerical Heat Transfer, Part A: Applications
- Vol. 31 (7) , 703-723
- https://doi.org/10.1080/10407789708914060
Abstract
Transient and steady state laser melting problems are numerically simulated for steel and Al-4.5% Cu. Enthalpy and apparent capacity methods are used to solve the energy equation, and the momentum equations are solved in the liquid domain and mushy zone with the SOLA-VOF algorithm. Using a laser with a top-hat profile, a wide range of studies are performed by varying the beam power density and the beam radius. The streamline plots show that the flow pattern is dependent on the strength of the rotating cell along with heat flux. It is found that the shape of the pool, the surface velocity, and the surface temperature are quite different from those without convection in the mushy zone. Convection in the mushy zone plays an important role in heat transfer and fluid flow during laser melting.Keywords
This publication has 10 references indexed in Scilit:
- A continuum model for momentum, heat and species transport in binary solid-liquid phase change systems—I. Model formulationPublished by Elsevier ,2003
- FINITE ELEMENT STUDY ON THE ROLE OF CONVECTION IN LASER SURFACE MELTINGNumerical Heat Transfer, Part A: Applications, 1994
- Numerical study of steady state and transient laser melting problems—I. Characteristics of flow field and heat transferInternational Journal of Heat and Mass Transfer, 1990
- ON THE NUMERICAL SOLUTION OF CONTINUUM MIXTURE MODEL EQUATIONS DESCRIBING BINARY SOLID-LIQUID PHASE CHANGENumerical Heat Transfer, Part B: Fundamentals, 1989
- Numerical study of steady-state laser melting problemInternational Journal of Heat and Mass Transfer, 1988
- A fixed grid numerical modelling methodology for convection-diffusion mushy region phase-change problemsInternational Journal of Heat and Mass Transfer, 1987
- A numerical study of thermocapillary flow in a rectangular cavity during laser meltingInternational Journal of Heat and Mass Transfer, 1986
- Fluid flow and weld penetration in stationary arc weldsMetallurgical Transactions A, 1985
- A two-dimensional transient model for convection in laser melted poolMetallurgical Transactions A, 1984
- Surface rippling induced by surface-tension gradients during laser surface melting and alloyingJournal of Applied Physics, 1977