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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 20, 1991 - Issue 2
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Original Articles

GRAVITY- AND SOLIDIFICATION-SHRINKAGE-INDUCED LIQUID FLOW IN A HORIZONTALLY SOLIDIFIED ALLOY INGOT

Darning Xu Department of Metallic Materials and Technology, Harbin Institute of Technology, Harbin, 150006, People's Republic of China
&
Qingchun Li Department of Metallic Materials and Technology, Harbin Institute of Technology, Harbin, 150006, People's Republic of China
Pages 203-221 | Received 12 Jun 1990, Accepted 27 Nov 1990, Published online: 27 Apr 2007
 
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Abstract

A basic-variable, explicit finite difference scheme is used to solve the unsteady and strongly pressure-coupled velocity problems of liquid flows induced both by thermosolutal buoyancies and solidification shrinkage in a binary alloy solidification process. A sample calculation, performed on an IBM personal computer, for a horizontally solidified Al-4.5%Cu alloy in a high-H/L ratio cavity with a top riser shows that the shrinkage established pressure gradient in the mushy region can be several hundred, even several thousand, times larger than that in the bulk liquid region.

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