Flow and slip process of Santotrac 50-based lubricant under high shear by molecular dynamic simulation

doi:10.1002/ls.1629

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Flow and slip process of Santotrac 50-based lubricant under high shear by molecular dynamic simulation
	Zhao X(赵欣)1,2; Wei,Chao 1; Yin,Zhenxin 1; Ma,Wenjie 3
刊名	LUBRICATION SCIENCE
	2022-10-21
页码	8
关键词	carbon-chain lubricant high shear rate molecular dynamics simulation slip
ISSN号	0954-0075
DOI	10.1002/ls.1629
通讯作者	Wei, Chao(weichaobit@163.com)
英文摘要	We investigate flow and slip behaviour of Santotrac 50 molecules under high shear in Couette cell by means of Molecular Dynamic simulation to understand reduced friction force. Molecular chain stretches and oriented to shear direction, and move. Slip starts on metal surface at 2 x 10(8) s(-1), and increases with shear rate. Slip length keeps scale at nanometre. Molecular conformation and occurrence of slip both indicate a reduced shear stress. Furthermore, when changing wettability, slip length increases in power law and thus decreases shear stress greatly. Occurrence of low-density region near surface can explain slip. And thus, we extended apparent slip model, which divided lubricant into liquid layers with different viscosities, to elucidate the relationship between molecule distribution inner layer and slip on surface influenced by shear velocity and wettability. Above all, our research sheds light on flow and slip behaviour of complex fluid and can be applied in improving lubrication property.
分类号	Q4
资助项目	National Natural Science Foundation of China[51875039]
WOS关键词	SURFACE-ENERGY ; FRICTION
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000870830400001
资助机构	National Natural Science Foundation of China
其他责任者	Wei, Chao
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90415]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Beijing Inst Technol, Natl Key Lab Vehicular Transmiss, Beijing, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing, Peoples R China; 3.Univ Laval, Dept Phys Genie Phys & Opt, Quebec City, PQ, Canada
推荐引用方式 GB/T 7714	Zhao X,Wei,Chao,Yin,Zhenxin,et al. Flow and slip process of Santotrac 50-based lubricant under high shear by molecular dynamic simulation[J]. LUBRICATION SCIENCE,2022:8.
APA	赵欣,Wei,Chao,Yin,Zhenxin,&Ma,Wenjie.(2022).Flow and slip process of Santotrac 50-based lubricant under high shear by molecular dynamic simulation.LUBRICATION SCIENCE,8.
MLA	赵欣,et al."Flow and slip process of Santotrac 50-based lubricant under high shear by molecular dynamic simulation".LUBRICATION SCIENCE (2022):8.