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Slip length and contact angle over hydrophobic surfaces
Chemical Physics Letters, 2007Abstract The relation between contact angle and slip length is explored using molecular dynamics for Couette flow of a Lennard–Jones fluid between graphite-like walls. Obtained results vary from the common notion that higher contact angles lead to greater slip and to more effective friction reduction. Effects of varying LJ parameters on contact angle
Roman S. Voronov +2 more
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On three simple experiments to determine slip lengths
Microfluidics and Nanofluidics, 2008It is now well established that for fluid flow at the micro- and nano-scales the standard no-slip boundary condition of fluid mechanics at fluid–solid interfaces is not applicable and must be replaced by a boundary condition that allows some degree of tangential fluid slip.
Matthews, M., Hill, J.
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Slip Length and Problem of Anomalous Velocity Profile
4th AIAA Theoretical Fluid Mechanics Meeting, 2005The most used expression for the slip length in the slip flow regime where slip conditions are needed for flow prediction comes from a Maxwell description of kinetic boundary conditions and depends on one coe dient only. Even if generally associated to the tangential accommodation coe dient, this coe dient equals any kind of kinetic property ...
Kokou Dadzie, Gilbert Méolans
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Slip Length–Based Boundary Condition for Modeling Drag Reduction Devices
AIAA Journal, 2017Riblets are one of the most interesting passive drag reduction techniques. They essentially consist of streamwise grooved surfaces.
MELE, Benedetto, TOGNACCINI, RENATO
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Influence of Wall Deformation on a Slip Length
2018This paper presents the effect of a wall deformation on the boundaries conditions of a shear flow of the viscous fluid over a deformable wall which has a periodic deformation and small amplitude. The Reynolds number for the flow over a wall is low and the creeping flow equations apply. The no-slip boundary condition on the deformable wall applies.
Redouane Assoudi +2 more
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Estimation of yarn strength based on critical slipping length and fiber length distribution
Textile Research Journal, 2017Yarn strength is composed of the total contributions made by all breaking and slipping fibers which are determined by critical slipping length lc. Though the definition of lc has been the focus of many research projects, it still remains unsolved. In this study, idealized assumptions were made on yarn structure, and lc was then estimated.
Zhan Jiang +4 more
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The Journal of Chemical Physics, 2006
Correlations between contact angle, a measure of the wetting of surfaces, and slip length are developed using nonequilibrium molecular dynamics for a Lennard-Jones fluid in Couette flow between graphitelike hexagonal-lattice walls. The fluid-wall interaction is varied by modulating the interfacial energy parameter εr=εsf∕εff and the size parameter σr ...
Roman S, Voronov +2 more
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Correlations between contact angle, a measure of the wetting of surfaces, and slip length are developed using nonequilibrium molecular dynamics for a Lennard-Jones fluid in Couette flow between graphitelike hexagonal-lattice walls. The fluid-wall interaction is varied by modulating the interfacial energy parameter εr=εsf∕εff and the size parameter σr ...
Roman S, Voronov +2 more
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Shape dependence of slip length on patterned hydrophobic surfaces
Applied Physics Letters, 2011The effects of solid-liquid interfacial shape on the boundary velocity slip of patterned hydrophobic surfaces are investigated. The scaling law in literature is extended to demonstrate the role of such shape, indicating a decrease of the effective slip length with increasing interfacial roughness.
Xiaokun Gu, Min Chen
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Frictional slip lengths for unidirectional superhydrophobic grooved surfaces
Physics of Fluids, 2011The exact solutions due to Philip [ZAMP 23, 353 (1972)] for Stokes shear flow over a periodic array of no-shear slots embedded in a no-slip surface are generalized to account for an arbitrary pattern of no-shear slots in each period window. The slots, or grooves, in each period window run parallel to each other, and are of infinite length, but their ...
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Slip length measurement in rectangular graphene nanochannels with a 3D flow analysis
Carbon, 2022Qin-Yi Li +2 more
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