Journal of Flow Visualization and Image Processing

ISSN for PRINT: 1065-3090

For Online Access

Best Paper Award Selection - Editorial Board Site

2000, Volume7

Issue 2

102 pages

Issue price - $140.00

K. Balatka
Tokyo University of Agriculture & Technology, Naka-cho 2-24-16, Koganei-shi, Tokyo 184-8588, Japan

Dr. Sadanari Mochizuki
Tokyo University of Agriculture and Technology, Department of Mechanical Systems Engineering, Koganei-shi, Naka-cho 2-24-16,Tokyo 184-8588, Japan

Dr. Akira Murata
Tokyo University of Agriculture and Technology, Department of Mechanical Systems Engineering, Koganei-shi, Naka-cho 2-24-16,Tokyo 184-8588, Japan

M. Kohayashi
Sanyo Electric Co., Ltd., 1-1-1, Sakata Oizumi-machi, Ora-gun, Gunma, Japan

In this study heat transfer and flow visualization experiments were performed on five different tube and fin heat exchangers (four of them with slits) for Re = 100 to 1500. The objective was to investigate the effects of various arrangements of slits and slit enclosure walls on the flow behavior and subsequently the heat transfer. The flow behavior was investigated by means of a dye injection and hydrogen bubble visualization technique. The heat transfer performance evaluation, performed by a single blow technique, revealed that the heat transfer is significantly lower for a certain slit and slit enclosure arrangement. It was shown by flow visualization techniques that the slit and slit wall enclosure arrangement has a significant influence on the flow behavior and consequently the heat transfer. Based on the obtained results, recommendations for the slit enclosure wall design are made.

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