ARTICLE:

• THERMAL-FLUID TRANSPORT PHENOMENA OVER SLOT-PERFORATED FLAT FINS IN FORCED CONVECTION ENVIRONMENT  download article

Shuichi Torii
Department of Mechanical Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima, 890-0065; and Department of Mechanical Engineering and Materials Science, Kumamoto University 2-39-1, Kurokami, Kumamoto, 860-8555, JAPAN

Wen-Jei Yang
Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, Michigan 48109, U.S.A.

ABSTRACT

A theoretical study is performed to investigate unsteady thermal and fluid flow transport phenomena over flat fins, which are placed in a forced convection environment. Emphasis is placed on the effects of Reynolds number and fin pitch on heat transfer performance and velocity and thermal fields. It is found that (i) in the high Reynolds number region, the alternating changes in the fluid flow take place for larger fin pitch, (ii) the alternating flow in the space area between two fins is mutually interacted by the corresponding one from the adjacent in-line plate fines, resulting in an amplification of heat transfer performance, and (iii) heat-transfer performance is intensified with a decrease in the fin pitch, whose trend becomes larger in the higher Reynolds number region.

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