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1Experimental investigation of anodized/spray pyrolysed nanoporous structure on heat transfer augmentation显示文摘This paper analyzes the effects of nanoporous surface on heat transfer temperaments of assorted thermal conductingmaterials. A phenomenal proposal of wielding the surface roughness to ameliorate the heat transfer ratehas been discovered. The maximum increase of heat transfer rate procured by nanoporous layers is 133.3% higherthan the polished bare metals of surface roughness 0.2μm. This plays an imperative role in designing compact refrigerationsystems, chemical and thermal power plants. Experimental results picture a formidable upswing of58.3% heat transfer in chemically etched metals of surface roughness 3 μm, 133.3% in nanoporous surface of porosity75-95 nm formed by electrochemical anodization, and porosity of 40-50 nm formed by spray pyrolysis increasesthe heat transfer by 130%. Effects of porosity, flow velocity and scaling on the energy transfer are alsoscrutinized. This paper also analyzes the multifarious modes of nanoporous fabrication, to contrive both prodigiousand provident system.Kalaiselvam S. Gugan M.S. Kuraloviyan E. Meganathan R. NiruthiyaPriyan A. Swaminathan M.R. 2009Journal of Thermal Science2009,18,4:0
2液滴撞击多孔表面动力学特性研究进展显示文摘液滴与多孔表面碰撞时,多孔表面的孔隙所引起的毛细力作用将对液滴的动力学行为产生一定的影响。研究液滴撞击多孔表面后的铺展、渗透、蒸发、传热等问题对调控多孔表面液滴的铺展以满足不同领域的应用需求具有重要的意义。总结归纳了液滴撞击多孔表面的理论、数值和实验方面的研究方法,对液滴撞击速度、液滴直径、孔隙率、孔径、韦伯数、黏度和表面张力等主要因素对液滴撞击动力学特性的影响规律进行综述,提出液滴在多孔表面的研究可从更加符合液滴撞击多孔介质的理论模型建立,新型多孔介质内部液滴特性及热物理参数测试技术等方面进行。张芳芳 车淑艳 李华杰 沈振 2023润滑与密封2023,48,12:0
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