Rheology of an Ionic Liquid with Variable Carreau Exponent: A Full Picture by Molecular Simulation with Experimental ContributionTribology Letters - Tập 64 - Trang 1-12 - 2016
Nicolas Voeltzel, Philippe Vergne, Nicolas Fillot, Nathalie Bouscharain, Laurent Joly
The rheological behavior of an ionic liquid was investigated by means of molecular dynamics simulations with experimental contribution, under conditions close to those found in the elastohydrodynamic and the very-thin film lubrication regimes. The molecular model was applied to nearly 200 temperature–pressure–shear rate cases, without any parameter adjustment. Experiments were conducted on a rheo...... hiện toàn bộ
Friction and Lubrication of Eye/Lens/Lid Interface: The Effect of Lubricant and Contact Lens MaterialTribology Letters - Tập 71 - Trang 1-18 - 2023
David Nečas, Vlastimil Kulíšek, Petr Štěpán, František Ondreáš, Pavel Čípek, Gloria Huerta-Angeles, Martin Vrbka
Irritation of the eye in the case of contact lens users may imply dry eye syndrome (DES), commonly treated by eye drops. The paper focuses on measuring the friction coefficient with the simultaneous observation of lubricating film formation of the simulated eye/lens/lid interface. The experiments are performed in a pin-on-plate setup under the linear reciprocal motion. The contact is lubricated by...... hiện toàn bộ
Shear-Induced Surface-to-Bulk Transport at Room Temperature in a Sliding Metal–Metal InterfaceTribology Letters - Tập 41 - Trang 257-261 - 2010
Octavio J. Furlong, Brendan P. Miller, Wilfred T. Tysoe
Predictions from molecular dynamics (MD) simulations, that sliding at a metal–metal interface causes vortices in the near-surface region that transport atoms from the surface into the subsurface region, is tested experimentally. This is accomplished by rubbing a methyl thiolate overlayer grown on a clean copper foil by exposure to dimethyl disulfide at room temperature. Repeatedly rubbing a 1.27 ×...... hiện toàn bộ
A Quantitative Measurement of Wall Shear Stress Using Electric Capacity Sensing of Nematic Liquid Crystal CoatingTribology Letters - - 2013
Songpeng Zhang, Xiangjun Zhang, Yu Tian, Yonggang Meng
The measurement of wall shear stress (WSS) still remains a challenge in many fields such as fluid hydrodynamics, microfluidics, or biomechanics. The nematic liquid crystal coating (LCC) is a prospective technique to measure WSS due to its global measurement capability, high resolution, and non-intrusive nature. But its current application based on the optical observation is severely limited by the...... hiện toàn bộ
A Note on the Two-Spring Tomlinson ModelTribology Letters - Tập 43 - Trang 73-76 - 2011
Pin Lu, Yee Chong Loke, Xiaosong Tang, Sunil S. Kushvaha, Sean J. O’Shea
In this note, quasistatic solutions of a two-mass-two-spring Tomlinson model for atomic force microscopy are derived, and are compared with the corresponding results of the single-spring Tomlinson model. It is clarified that the solutions of the two models are equivalent provided that the effective spring constant is correctly defined. It is also shown that modeling the onset of stick-slip motion ...... hiện toàn bộ
Dòng Chảy Dầu Nhờn Trong Liên Kết Động Lực Elastohydrodynamic Sử Dụng Huỳnh Quang Dịch bởi AI Tribology Letters - Tập 38 - Trang 207-215 - 2010
T. Reddyhoff, J. H. Choo, H. A. Spikes, R. P. Glovnea
Đã có nhiều tài liệu ghi lại rằng các tham số như độ dày màng và nhiệt độ trong các liên kết EHL có thể được đo lường một cách thực nghiệm bằng cách sử dụng nhiều kỹ thuật khác nhau như giao thoa quang học, siêu âm, điện dung và phát xạ hồng ngoại. Tuy nhiên, rất ít thông tin được biết đến về dòng chảy của dầu nhờn qua các liên kết này. Thông tin về dòng chảy của dầu nhờn sẽ rất có lợi cho việc dự...... hiện toàn bộ
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