Effects of void-induced convection on interface morphology and segregation during low-g solidification

Academic Article

Abstract

  • Recent microgravity experiments have been hampered by convection caused by unwanted voids and/or bubbles in the melt. In this work, a numerical model is developed to describe how thermocapillary convection generated by a void can affect a typical Bridgman solidification process in microgravity. The model is based on the quasi-steady Navier-Stokes equations for a Newtonian fluid coupled with the conservation equations for transport of energy and species. Numerical solutions for a variety of operating conditions indicate that void-generated thermocapillary convection can have a drastic effect on both interface morphology and solutal transport. © 2004 Elsevier Ltd. All rights reserved.
  • Digital Object Identifier (doi)

    Author List

  • Barsi S; Kassemi M; Alexander JID
  • Start Page

  • 5129
  • End Page

  • 5137
  • Volume

  • 47
  • Issue

  • 23