Analysis of a Double Pipe Heat Exchanger Performance by Use of Porous Baffles and Nanofluids
Analysis of a Double Pipe Heat Exchanger Performance by Use of Porous Baffles and Nanofluids
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使用多孔挡板和纳米流体的双管换热器性能分析
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
H. Kahalerras
中科院分区：
文献类型：
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作者：
N. Targui;H. Kahalerras
本文对纳米流体在带多孔折流板的双管换热器中的流动进行了数值模拟。热的纳米流体在内圆筒中流动，而冷的纳米流体在环形间隙中循环。采用Darcy-Brinkman-Forchheimer模型描述多孔介质中的流动，并采用有限体积法求解控制方程组和适当的边界条件。结果表明，与传统流体相比，金属纳米颗粒的加入提高了传热速率，但这种增强伴随着压降的增加。当纳米颗粒仅添加到冷流体中时，获得最高的热交换器性能。
: The present work is a numerical simulation of nanofluids flow in a double pipe heat exchanger provided with porous baffles. The hot nanofluid flows in the inner cylinder, whereas the cold nanofluid circulates in the annular gap. The Darcy-Brinkman-Forchheimer model is adopted to describe the flow in the porous regions, and the governing equations with the appropriate boundary conditions are solved by the finite volume method. The results reveal that the addition of metallic nanoparticles enhances the rate of heat transfer in comparison to conventional fluids but this augmentation is accompanied by an increase in pressure drop. The highest heat exchanger performances are obtained when nanoparticles are added only to the cold fluid.