Effect of a premelted film on the dynamics of particle-solidification front interactions

J. W GARVIN; H. S UDAYKUMAR

doi:10.1016/j.jcrysgro.2006.01.018

Back

Effect of a premelted film on the dynamics of particle-solidification front interactions

Journal article

Peer reviewed

Effect of a premelted film on the dynamics of particle-solidification front interactions

J. W GARVIN and H. S UDAYKUMAR

Journal of crystal growth, Vol.290(2), pp.602-614

2006

DOI: 10.1016/j.jcrysgro.2006.01.018

View Online

Abstract

Numerical simulations are performed to study the interaction of a solidification front with an embedded particle. A sharp-interface method is used to track both the phase boundary and the particle. The solidification front dynamics is fully coupled with particle motion. The main objective of the paper is to distinguish the role played by the premelted layer between the solidification front and the particle in determining conditions for particle engulfment. Results are obtained by assuming a premelted layer exists in the gap between the particle and the solidification front and compared to those assuming no premelted layer. In the absence of a premelted layer, arbitrary cut-off values for particle-front gap thickness need to be invoked in order to define the critical velocity for which the pushing–engulfment transition occurs. When a premelted layer is assumed to exist, the prediction of the critical velocity is determined solely from the dynamics of the coupled front–particle interaction. In addition, model predictions for the critical velocity based on a steady-state heat transfer analysis are shown to differ from that when the full dynamics of the phase boundary are taken into account.

Materials Science

Physics

Methods of crystal growth; physics of crystal growth

Growth from melts; zone melting and refining

Cross-disciplinary physics: materials science; rheology

Exact sciences and technology

Details

Title: Subtitle: Effect of a premelted film on the dynamics of particle-solidification front interactions
Creators: J. W GARVIN - Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA-52242, United States
H. S UDAYKUMAR - Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA-52242, United States
Resource Type: Journal article
Publication Details: Journal of crystal growth, Vol.290(2), pp.602-614
DOI: 10.1016/j.jcrysgro.2006.01.018
ISSN: 0022-0248
eISSN: 1873-5002
Publisher: Elsevier; Amsterdam
Language: English
Date published: 2006
Academic Unit: Injury Prevention Research Center; Mechanical Engineering
Record Identifier: 9984064576202771

Metrics

18 Record Views

10 Times Cited - Web of Science