Journal of Flow Visualization and Image Processing

ISSN for PRINT: 1065-3090

For Online Access

Best Paper Award Selection - Editorial Board Site

2001, Volume8

Issue 2-3

110 pages

Issue price - $280.00

Hiroshi Ohue
Department of Mechanical Engineering, Musashi Institute of Technology, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo, 158-8557 Japan

Genshi Kawashima
Department of Mechanical Engineering, Musashi Institute of Technology, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo, 158-8557 Japan

We performed thermal visualization to determine unsteady heat transfer in a flow through an array of slanted fins installed vertically on a heated surface coated with a thin sheet of thermosensitive liquid crystal. The fins are arranged in in-line and staggered forms. The fin angle, transverse pitch, and longitudinal pitch are varied. The convective heat transfer phenomena can be visualized as color distribution on the liquid crystal sheet which exhibits temperature variation. Color image processing is performed on the visualized images to determine the quantitative temperature distribution through a hue angle-temperature correlation curve, and thus we can represent the unsteady temperature distribution for convective heat transfer. We also performed flow visualization of flow patterns through the fin array. The Nusselt number for convective heat transfer between the heated surface and the cold fluid is calculated from the temperature distribution. Pressure drop for the flow through the fin array is measured and is expressed in the form of the coefficient of pressure loss. Results are correlated as Nusselt number versus coefficient of pressure loss for fin angles, fin arrangements, and flow patterns.

Download article, 10 pages

Article price - $35.00

<< Previous article   Next article >>