Role of wall-fluid interaction and rough morphology in heat and momentum exchange in nanochannel

doi:10.1016/j.apenergy.2021.117183

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Role of wall-fluid interaction and rough morphology in heat and momentum exchange in nanochannel
	Yao, Shuting 1,2,3; Wang, Jiansheng 1,3; Liu, Xueling 1,3
刊名	APPLIED ENERGY
	2021-09-15
卷号	298
关键词	Wall-fluid interaction Rough morphology Heat transfer Molecular dynamics
ISSN号	0306-2619
DOI	10.1016/j.apenergy.2021.117183
英文摘要	As an efficient cooling method, the convective heat transfer in nanochannel has been widely utilized in thermal management of various energy systems. However, the effects of surface roughness on velocity slip and flow resistance in nanochannel are still unclear. The effects of rough morphology and wall-fluid interaction on the flow and thermal characteristics in rectangular nanochannel are probed with molecular dynamics method. The results show that nanostructure morphology and wall-fluid interaction induce distinct variations in temperature jump and velocity slip, which further determine the heat and momentum exchange between the channel wall and fluid. Specifically, rough morphology is responsible for the augments of heat transfer and flow resistance, which is derived from limitation on the motion of fluid atoms by the nanostructure grooves in channel. In comparison, the strong wall-fluid interaction brings about the improvement of heat transfer and the increase of flow resistance, which owes to the adsorption enhancement. As the nanostructure free shear ratio increases from 0.1875 to 0.75, the flow resistance increases and heat transfer performance weakens. Yet, the combination of rough morphology and wall-fluid interaction is significant for overall heat transfer performance. The overall heat transfer performance in rough channel with the weak wall-fluid interaction is superior. The Nusselt number in rough channel only decreases by 1.78% while the resistance coefficient reduces by 27.1%. The optimal overall performance is achieved in rough channel with the nanostructure free shear ratio of 0.1875.
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000675858300001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148800]
专题	石油化工学院
作者单位	1.Tianjin Univ, Sch Mech Engn, Tianjin Key Lab Nonlinear Dynam & Chaos Control, Tianjin 300350, Peoples R China; 2.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Peoples R China; 3.Tianjin Univ, Sch Mech Engn, Key Lab Efficient Utilizat Low & Medium Grade Ene, MOE, Tianjin 300350, Peoples R China
推荐引用方式 GB/T 7714	Yao, Shuting,Wang, Jiansheng,Liu, Xueling. Role of wall-fluid interaction and rough morphology in heat and momentum exchange in nanochannel[J]. APPLIED ENERGY,2021,298.
APA	Yao, Shuting,Wang, Jiansheng,&Liu, Xueling.(2021).Role of wall-fluid interaction and rough morphology in heat and momentum exchange in nanochannel.APPLIED ENERGY,298.
MLA	Yao, Shuting,et al."Role of wall-fluid interaction and rough morphology in heat and momentum exchange in nanochannel".APPLIED ENERGY 298(2021).