AI Chat Paper
Discover the SciOpen Platform and Achieve Your Research Goals with Ease.
Search articles, authors, keywords, DOl and etc.
{{expandStatus?'Exit ':''}}Advanced Search
Understanding flow characteristics of fluid near rough contact is important for the design of fluid-based lubrication and basic of tribology physics. In this study, the spreading and seepage processes of anhydrous ethanol in the interface between glass and rough PDMS are observed by a homemade optical in-situ tester. Digital image processing technology and numerical simulation software are adapted to identify and extract the topological properties of interface and thin fluid flow characteristics. Particular attention is paid to the dynamic evolution of the contact interface morphology under different stresses, the distribution of microchannels in the interface, the spreading characteristics of the fluid in contact interface, as well as the mechanical driving mechanism. Original surface morphology and the contact stress have a significant impact on the interface topography and the distribution of interfacial microchannels, which shows that the feature lengths of the microchannels, the spreading area and the spreading rate of the fluid are inversely proportional to the load. And the flow path of the fluid in the interface is mainly divided into three stages: along the wall of the island, generating liquid bridges, and moving from the tip side to the root side in the wedge-shaped channel. The main mechanical mechanism of liquid flow in the interface is the equilibrium between the capillary force that drives the liquid spreading and viscous resistance of solid wall to liquid. In addition, the phenomenon of “trapped air” occurs during the flow process due to the irregular characteristics of the microchannel. This study lays a certain theoretical foundation for the research of microscopic flow behavior of the liquid in the rough contact interface, the friction and lubrication of the mechanical system, and the sealing mechanism.
Stupkiewicz S, Marciniszyn A. Elastohydrodynamic lubrication and finite configuration changes in reciprocating elastomeric seals. Tribol Int 42(5): 615–627 (2009)
Sahlin F, Larsson R, Almqvist A, Lugt P M, Marklund P. A mixed lubrication model incorporating measured surface topography. Part 1: Theory of flow factors. Proc Inst Mech Eng Part J J Eng Tribol 224(4): 335–351 (2010)
Narayanamurthy V, Jeroish Z E, Bhuvaneshwari K S, Bayat P, Premkumar R, Samsuri F, Yusoff M M. Advances in passively driven microfluidics and lab-on-chip devices: A comprehensive literature review and patent analysis. RSC Adv 10(20): 11652–11680 (2020)
Schultz R, Skoumal R J, Brudzinski M R, Eaton D, Baptie B, Ellsworth W. Hydraulic fracturing-induced seismicity. Rev Geophys 58(3): e2019RG000695 (2020)
Cai J C, Jin T X, Kou J S, Zou S M, Xiao J F, Meng Q B. Lucas–washburn equation-based modeling of capillary-driven flow in porous systems. Langmuir 37(5): 1623–1636 (2021)
Paggi M, He Q C. Evolution of the free volume between rough surfaces in contact. Wear 336–337: 86–95 (2015)
Persson B J. Fluid dynamics at the interface between contacting elastic solids with randomly rough surfaces. J Phys: Condens Matter 22(26): 265004 (2010)
Dapp W B, Lücke A, Persson B N J, Müser M H. Self-affine elastic contacts: Percolation and leakage. Phys Rev Lett 108(24): 244301 (2012)
Shvarts A G, Yastrebov V A. Fluid flow across a wavy channel brought in contact. Tribol Int 126: 116–126 (2018)
Shvarts A G, Vignollet J, Yastrebov V A. Computational framework for monolithic coupling for thin fluid flow in contact interfaces. Comput Meth Appl Mech Eng 379: 113738 (2021)
Huang D, Yan X, Larsson R, Almqvist A. The critical pressure for bulk leakage of non-planar smooth surfaces. Tribol Lett 70(3): 74 (2022)
Huang D, Yan X, Larsson R, Almqvist A. Leakage threshold of a saddle point. Tribol Lett 71(2): 40 (2023)
Cai J C, Chen Y, Liu Y, Li S, Sun C H. Capillary imbibition and flow of wetting liquid in irregular capillaries: A 100-year review. Adv Colloid Interface Sci 304: 102654 (2022)
Lucas R. The time law of the capillary rise of liquids. Kolloid-Zeitschrift 23(1): 15–22 (1918)
Washburn E W. The dynamics of capillary flow. Phys Rev 17(3): 273–283 (1921)
Zhu Y, Petkovic-Duran K. Capillary flow in microchannels. Microfluid Nanofluid 8(2): 275–282 (2010)
Zhong H, Huang W F, Li Y, Tong H, Liu G D, Wang Z Q. Flow modeling and experimental verification of flow resistors used in microfluidic chips driven by capillary force. J Micromech Microeng 30(11): 115015 (2020)
Pasias D, Passos A, Constantinides G, Balabani S, Kaliviotis E. Surface tension driven flow of blood in a rectangular microfluidic channel: Effect of erythrocyte aggregation. Phys Fluids 32(7): 071903 (2020)
Papadimitriou V A, Segerink L I, van den Berg A, Eijkel J C T. 3D capillary stop valves for versatile patterning inside microfluidic chips. Anal Chim Acta 1000: 232–238 (2018)
Wang J J, Salama A, Kou J S. Experimental and numerical analysis of imbibition processes in a corrugated capillary tube. Capillarity 5(5): 83–90 (2022)
Joshi M A. Digital Image Processing: An Algorithmic Approach. Delhi (India): PHI Learning Pvt. Ltd., 2018.
Khare H S, Burris D L. A quantitative method for measuring nanocomposite dispersion. Polymer 51(3): 719–729 (2010)
Sun W, Liu X J, Liu K, Xu J M, Lu Y X, Ye J X. Mechanochemical functionality of graphene additives in ultralow wear polytetrafluoroethylene composites. Carbon 184: 312–321 (2021)
Pfestorf M, Engel U, Geiger M. Three-dimensional characterization of surfaces for sheet metal forming. Wear 216(2): 244–250 (1998)
Xian Z K, Du Z H, Chen Y F, Liu L M, You H. Dynamic contact angle measurement of hydrophilic open microchannels: The role of surface wettability. Phys Fluids 35(9): 092110 (2023)
Gervais L, Hitzbleck M, Delamarche E. Capillary-driven multiparametric microfluidic chips for one-step immunoassays. Biosens Bioelectron 27(1): 64–70 (2011)
Qin Z P, Du Z H, Xian Z K, You H. Theoretical and experimental study on capillary flow in a grooved microchannel with hydrophilic or hydrophobic walls. J Fluids Struct 123: 103988 (2023)
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.
The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
京公网安备11010802044758号