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Journal of Enhanced Heat Transfer
Импакт фактор: 1.406 5-летний Импакт фактор: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Печать: 1065-5131
ISSN Онлайн: 1026-5511

Выпуски:
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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2012004509
pages 359-367

EFFECT OF DIMPLE ARRANGEMENTS ON THE TURBULENT HEAT TRANSFER IN A DIMPLED CHANNEL

Y. O. Lee
Korea Power Engineering Company, Yongin, Korea
Joon Ahn
School of Mechanical Engineering, Kookmin University, Seoul National University, Seoul, Korea
Jungwoo Kim
Seoul National University of Science and Technology
Joon Sik Lee
School of Mechanical and Aerospace Engineering, Seoul National University, San 56-1. Sillim-dong Gwanak-gu. Seoul 151-742 Korea

Краткое описание

Large eddy simulations (LES) have been conducted for the flow and heat transfer in a dimpled channel at the bulk Reynolds number of 20,000 to study the effect of dimple arrangements. Dimples are placed on one side of the channel in three canonical arrangements: in-line, staggered, or with cylindrical grooves. Heat transfer is not actively augmented at the spanwise gap between dimples for the in-line arrangement, while the problem can be cured by adopting the staggered arrangement. The cylindrical grooves provide heat transfer enhancement effect as much as the staggered arrayed dimples do.


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