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Experimental Investigation on Fluid Mechanics of Micro-Channel Heat Transfer Devices
Experimental Thermal and Fluid Science ( IF 3.2 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.expthermflusci.2020.110141
M. Spizzichino , G. Sinibaldi , G.P. Romano

Abstract The future technological horizons for engineering applications (Automotive, Energy, Bio-Engineering) require the use of limited size heat exchangers with high efficiency. In the present work, the flow field in small scale channels of different geometries is investigated experimentally using µPIV (micro Particle Image Velocimetry) and thermal measurements. The Reynolds number in the channels is changed as also the wall temperature, in order to investigate and improve the thermal efficiency at different flow rates, temperatures and geometrical configurations. The main result of this investigation is that a serpentine cell attains the highest efficiency regardless of flow regime, getting high Nusselt numbers combined with low pressure losses, as derived by the observation of quite high local velocities and few recirculation regions.

中文翻译:

微通道传热装置流体力学实验研究

摘要 工程应用(汽车、能源、生物工程)的未来技术前景需要使用有限尺寸的高效换热器。在目前的工作中,使用 μPIV(微粒子图像测速)和热测量对不同几何形状的小尺度通道中的流场进行了实验研究。通道中的雷诺数随着壁温的变化而变化,以研究和提高不同流速、温度和几何结构下的热效率。这项研究的主要结果是,蛇形电池无论流动状态如何都能获得最高效率,获得高努塞尔数和低压力损失,这是通过观察到相当高的局部速度和很少的再循环区域得出的。
更新日期:2020-10-01
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