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Effects of working temperature and fluid physical properties on heat transfer enhancement in conduction pumping: An experimental study
International Journal of Thermal Sciences ( IF 4.5 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.ijthermalsci.2020.106471
Moharram Jafari , Navid Farrokhi , Esmaeil Esmaeilzadeh

Abstract In the current study, heat transfer behavior in electrohydrodynamic conduction pumping of two different dielectric liquid films using flush electrodes has been experimentally studied, and effects of working temperature and fluid physical properties on heat transfer enhancement are investigated. The study is conducted for different liquid film thicknesses and working temperatures, while changing the magnitude of the applied electrical voltage. Results show that higher ion mobility difference and working temperature of the dielectric liquid, as well as lower density and viscosity increase flow rate and heat transfer of the pump. Also, it is seen that heat transfer coefficient is intensively enhanced for all different film thicknesses and working temperatures by using the conduction pump, which is due to the turbulent flow created in the vicinity of the electrodes. For 8 mm film thickness of n-hexane at 35 °C , the significant enhancement of heat transfer coefficient equal to 1040.9% was observed.

中文翻译:

工作温度和流体物理性质对传导泵送强化传热的影响:实验研究

摘要 在目前的研究中,实验研究了使用冲洗电极的两种不同介电液膜的电流体动力传导泵送的传热行为,并研究了工作温度和流体物理性质对传热增强的影响。该研究针对不同的液膜厚度和工作温度进行,同时改变所施加电压的幅度。结果表明,较高的离子迁移率差异和介电液体的工作温度以及较低的密度和粘度会增加泵的流速和传​​热。此外,还可以看出,通过使用传导泵,对于所有不同的膜厚和工作温度,传热系数都得到了显着提高,这是由于在电极附近产生的湍流。对于 8 mm 膜厚的正己烷,在 35 °C 时,观察到传热系数显着提高了 1040.9%。
更新日期:2020-10-01
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