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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Imprimer: 1065-3090
ISSN En ligne: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v5.i4.10
pages 261-273


Jongmin Shin
Home Appliance Research Lab., LG Electronics Inc., Gaeumjeong-Dong 391-2, Changwon, Kyoungnam 641-711, Korea
Wen-Jei Yang
Department of Mechanical Engineering and Applied Mechanics University of Michigan, Ann Arbor, Michigan 48109-2125, U.S.A.
Chung-Sheng Wu
Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, Michigan, USA


A novel type of heat exchanger with high potential industrial applications is a flow network consisting of mutually intersecting holes in a plate. A series of empirical studies have been conducted to investigate fluid flow behavior in both a prototype unit and models using various flow visualization methods, such as hydrogen bubble, dye injection, string, particle methods, and laser Doppler velocimetry.
In this article flows in a pair of intersecting ducts with different intersection angles are investigated numerically using commercial software called Fluent. The Renormalization Group (RNG) k-ε model is used to simulate turbulence behavior in the flow.
The numerical visualization technique has successfully revealed turbulent flow characteristics inside the crossing ducts of various intersection angles. The formation of a flow divider and the presence of flow separation regions seen in experiments are confirmed. Three types of pressure-intersection angle relationships are found in different ranges of the intersection angles.