Number：

103B_評點二_曾憲中_02

103B_ME2_006

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Titles：

Author：

Tzer-Ming Jeng，Sheng-Chung Tzeng，Guan-Wei Xu

Paper name：

Flow visualization of fluid flow through a U-bend channel with periodical high-permeability porous blocks

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Keywords：Flow visualization，180-deg turned channel，Aluminum-foam blocks

Abstract：The issue about the heat transfer enhancement in a 180-deg turned channel has attracted many attentions. The heat transfer capacity is influenced strongly by the behavior of the fluid flow. This work experimentally investigated the fluid flow characteristics in a 180-deg round turned channel with discrete aluminum-foam blocks. The air was used as coolant. Several aluminum-foam blocks(0.90 porosity and 10PPI pore density) were installed discretely in the 180-deg round turned channel with the square cross section. Four kinds of test section were employed to perform the flow visualizations. The results indicate that the arrangement of aluminum-foam blocks impacts on the flow pattern remarkably. The present results can be used to explain the pressure drop characteristics of such aluminum-foam channel，and be benchmarking by other investigators who would like to solve this problem numerically.