Number：

103B_ME1_001

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Name：

Titles：

Author：

吳振源、鄭澤明、曾憲中、黃彥慈、王潮熏

Chen-Yuan Wu，Tzer-Ming Jeng，Sheng-Cgung Tzeng，Yan-Cih Huang，Chao-Xun Wang

Paper name：

具多個發泡材塊之U型通道之熱流模擬分析

Naumerical Analysis of Heat Transfer and Fluid Flow Behaviors in a U-bend

Channel with Multiple Aluminum-Foam Blocks

Name of activity：

第21屆全國計算流體力學學術研討會

The 21th National Computational Fluid Dynamics Conference

Keywords：發泡鋁材塊、U型通道、數值模擬、熱傳、紊流

Al-foam blocks，U-bend channel，numerical simulation，heat transfer，turbulent flow

Abstract：

本研究以三維數值計算方法探討空氣流過具分散排列之0.9孔隙率/10PPI恐密之發泡鋁材塊的U型通道的熱流特性，動量方程式為雷諾平均Navier-Stokes方程式，能量方程式則為單方程式模式，紊流模式採用k-ε模式，相關多孔性參數為實驗量測經驗值，並採用6面體非結構化之可調適網路，計有4種不同發泡鋁材塊排列方式之U型通道做為模擬案例，雷諾數設定在3340~13358之間。數值模擬結果可清楚觀察速度場、壓力場及溫度場，並可以計算出通道表面之紐賽數與整體壓力降，有利於瞭解空氣流經此4種模式之多孔性U型通道對流動與熱傳行為之影響，此外，在定性與定量的比較上，本研究模擬之結果均與作者先前之實驗測量結果相吻合。

This work investigated the fluid flow and heat transfer characteristics of air through

The U-bend channel with discrete 0.9-porosity/10-PPI Al-foam blocks by three-dimensional simulations. The momentum equation was the Reynolds average Navier-Stokes equation，and the energyEquation used the One-equation model. The k-εmodel was employed to simulate the turbulent flow.Relevant porous parameters referred to the empirical values. The adaptive unstructured Hex grids Were also used for simulations. Total four types of U-bend channels with multiple al-foam blocks In various arrangements were selected as study cases. The range of Reynolds number was from 3340 to 13358.The simulation results showed the velocity，pressure and temperature fields clearly. The Nusselt number and pressure drop were calculated to understand the effect of porous-blocks Arrangement on the fluid flow and heat transfer. Besides，in the qualitative and quantitative comparisons。The present numerical results agreed with the previous experimental results by the authors.