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RESEARCH PAPERS: Liquid Jet Impingement

Conjugate Heat Transfer From a Heated Disk to a Thin Liquid Film Formed by a Controlled Impinging Jet

[+] Author and Article Information
A. Faghri, S. Thomas, M. M. Rahman

Department of Mechanical and Materials Engineering, Wright State University, Dayton, OH 45435

J. Heat Transfer 115(1), 116-123 (Feb 01, 1993) (8 pages) doi:10.1115/1.2910636 History: Received July 29, 1991; Revised May 27, 1992; Online May 23, 2008

Abstract

An experimental and numerical study of the heat transfer from a heated horizontal disk to a thin film of liquid is described. The liquid was delivered to the disk by a collar arrangement such that the film thickness and radial velocity were known at the outer radius of the collar. This method of delivery is termed as a controlled impinging jet. Flow visualization tests were performed and heat transfer data were collected along the radius of the disk for different volumetric flow rates and inlet temperatures in the supercritical and subcritical regions. The heat transfer coefficient was found to increase with flow rate when both supercritical and subcritical regions were present on the heated surface. A numerical simulation of this free surface problem was performed, which included the effects of conjugate heat transfer within the heated disk and the liquid. The numerical predictions agree with the experimental results and show that conjugate heat transfer has a significant effect on the local wall temperature and heat transfer coefficient.

Copyright © 1993 by The American Society of Mechanical Engineers
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