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RESEARCH PAPERS: Phase Change and Multiphase Heat Transfer

A Model for Solidification Under the Influence of Thermoelectric and Magnetohydrodynamic Effects: Application to Peltier Demarcation During Directional Solidification With Different Gravitational Conditions

[+] Author and Article Information
L. L. Zheng, D. J. Larson

Department of Materials Science and Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794

H. Zhang

Department of Mechanical Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794

V. Prasad

Consortium for Crystal Growth Research, State University of New York at Stony Brook, Stony Brook, NY 11794

J. Heat Transfer 120(2), 430-440 (May 01, 1998) (11 pages) doi:10.1115/1.2824268 History: Received May 22, 1997; Revised February 08, 1998; Online December 05, 2007

Abstract

A physics-based model is developed to study the gravitational (convection), thermoelectric (Peltier, Seebeck, Joule, and Thomson) and magnetohydrodynamic (Lorentz force) effects on solidification phenomena. A scaling analysis is carried out to examine the importance and contributions of various governing parameters. Directional solidification with Peltier Interface Demarcation under varying gravitational conditions is simulated for the Bridgman–Stockbarger configuration. The predicted interface location and movement during current pulsing are studied and the microstructures corresponding to different current polarities are analyzed based on Jackson–Hunt theory.

Copyright © 1998 by The American Society of Mechanical Engineers
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