University of Illinois Urbana-Champaign

Effect of rotation on flow instabilities during solidification of binary alloy

Riahi, Daniel N.; Sayre, Tracy L.

Permalink

https://hdl.handle.net/2142/112480

Description

Title
Effect of rotation on flow instabilities during solidification of binary alloy
Author(s)
  • Riahi, Daniel N.
  • Sayre, Tracy L.
Issue Date
1995-02
Keyword(s)
  • Linear Flow Instabilities
  • Binary Alloy
  • Rotation
Abstract
Linear flow instabilities of the liquid and mushy regions during solidification of a binary alloy is investigated under a high gravity environment where the rotation axis is inclined to the high gravity vector. Results of stability analyses and numerical computations for a centrifugal mode of distrubance at several different rotation rates are determined which provide information for various flow features in the liquid and the mushy layers including neutral stability curves, streamlines and density plots for solid fraction perturbation in the mushy layer. The results indicate two distinct modes of convection whose dependences with respect to rotation rate suggest a procedure for possible elimination of chimneys formation tendency in the mushy layer. These chimneys are vertical channels of zero solid fraction and are kind of imperfections that reduce the quality of the solidified materials.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 784
  • 1995-6006
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112480
Copyright and License Information
Copyright 1995 Board of Trustees of the University of Illinois

Owning Collections

Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.