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RESEARCH PAPERS: Materials Processing

Thermal Analysis of the Hot Dip-Coating Process

[+] Author and Article Information
Hui Zhang, M. Karim Moallemi, Sunil Kumar

Department of Mechanical and Industrial Engineering, Polytechnic University, Brooklyn, NY 11201

J. Heat Transfer 115(2), 453-460 (May 01, 1993) (8 pages) doi:10.1115/1.2910698 History: Received June 01, 1992; Revised September 01, 1992; Online May 23, 2008

Abstract

In this study a thermal analysis is performed on the hot dip-coating process where solidification of metal occurs on a bar moving through a finite molten bath. A continuum model is considered that accounts for important transport mechanisms such as axial heat diffusion, buoyancy, and shear-induced melt motion in the bath. A numerical solution procedure is developed, and its predictions are compared with those of an analytical approximate solution, as well as available experimental data. The predictions of the numerical scheme are in good agreement with the experimental data. The results of the approximate solution, however, exhibit significant disagreement with the data, which is attributed to the simplifying assumptions used in its development. Parametric effects of the bath geometry, and initial and boundary temperatures and solid velocity, as characterized by the Reynolds number, Grashof number, and Stefan numbers, are presented.

Copyright © 1993 by The American Society of Mechanical Engineers
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