Results 31 to 40 of about 461,135 (297)

High-Velocity Shear and Soft Friction at the Nanometer Scale

Frontiers in Mechanical Engineering, 2021
We study high-speed friction on soft polymer materials by measuring the amplitude dependence of cyclic lateral forces on the atomic force microscope (AFM) tip as it slides on the surface with fixed contact force.
Per-Anders Thorén, Riccardo Borgani, Daniel Forchheimer, David B. Haviland   +3 more
doaj   +1 more source

Measurement and Quantification of Effective Slip Length at Solid–Liquid Interface of Roughness-Induced Surfaces with Oleophobicity

Applied Sciences, 2018
Boundary conditions of the liquid–solid interface of micro/nano fluid flow are of great interest, as slippage is linked with decreased drag. However, previous studies have seldom included a systematic analysis of the effect of roughness on the ...
Yifan Li, Yunlu Pan, Xuezeng Zhao
doaj   +1 more source

Drag Reduction by Riblets on a Commercial UAV

Applied Sciences, 2022
Riblets are micro-grooves capable of decreasing skin-friction drag, but recent work suggests that additional benefits are possible for other components of aerodynamic drag. The effect of riblets on a fixed-wing, low-speed Unmanned Aerial Vehicle (UAV) on
Lorenzo Cacciatori, Carlo Brignoli, Benedetto Mele, Federica Gattere, Celeste Monti, Maurizio Quadrio   +5 more
doaj   +1 more source

Giant slip length at a supercooled liquid-solid interface

Physical Review E, 2023
The effect of temperature on friction and slip at the liquid-solid interface has attracted attention over the last twenty years, both numerically and experimentally. However, the role of temperature on slip close to the glass transition has been less explored.
Lafon, Suzanne, Chennevière, Alexis, Restagno, Frédéric, Merabia, Samy, Joly, Laurent   +4 more
openaire   +3 more sources

Lattice Boltzmann Simulation of Fluid Flow Characteristics in a Rock Micro-Fracture Based on the Pseudo-Potential Model

Energies, 2018
Slip boundary has an important influence on fluid flow, which is non-negligible in rock micro-fractures. In this paper, an improved pseudo-potential multi-relaxation-time (MRT) lattice Boltzmann method (LBM), which can achieve a large density ratio, is ...
Pengyu Wang, Zhiliang Wang, Linfang Shen, Libin Xin   +3 more
doaj   +1 more source

Surface roughness and interfacial slip boundary condition for quartz crystal microbalances [PDF]

, 2003
The response of a quartz crystal microbalance (QCM) is considered using a wave equation for the substrate and the Navier-Stokes equations for a finite liquid layer under a slip boundary condition.
Daikhin L., G. McHale, M. I. Newton, Schumacher R., Schumacher R., Soares D. M., Yang M., Yang M.   +7 more
core   +1 more source

The Effect of Wall Shear Stress and Viscous Heating on Nanoscale Flow [PDF]

Port Said Engineering Research Journal, 2018
The effect of wall shear stress and viscous heating on nano scale flow properties and boundary conditions is presented. Molecular dynamics (MD) simulations is implemented to handle nano scale force-driven Poiseuille flow bounded by two parallel planner ...
Mohamed Elsabahy, Ahmed Abdelhameed, Yassen Yassen   +2 more
doaj   +1 more source

Surface Roughness and Effective Stick-Slip Motion [PDF]

, 2002
The effect of random surface roughness on hydrodynamics of viscous incompressible liquid is discussed. Roughness-driven contributions to hydrodynamic flows, energy dissipation, and friction force are calculated in a wide range of parameters.
A. Carambassis, A. Kundt, A.E. Meyerovich, A.E. Meyerovich, A.L. Demirel, A.L. Demirel, A.L. Weisenhorn, C. Eftimiu, D. Einzel, D. Einzel, D. Einzel, D. Xiu, D.A. Ritchie, D.R. Berard, D.R. Willis, E. Bonaccurso, F. Restagno, G. Reiter, H. Shinto, H. Smith, H.H. Jensen, J. Crassous, J.E. Jaffe, J.F. Nye, J.F. Nye, J.M. Parpia, J.W.G. Tyrrell, K.B. Migler, K.D. Ivanova-Moser, K.M. Jansons, L. Daikhin, L. Daikhin, M. Urbakh, M.G. Rozman, O.I. Vinogradova, O.I. Vinogradova, O.I. Vinogradova, P. Panzer, P. Welander, R. Pit, R.G. Horn, S. Albertoni, S. Richardson, V.S.J. Craig, W.K.-H. Chu, W.K.-H. Chu, Y. Zhu   +46 more
core   +4 more sources

Stochastic Properties of Static Friction [PDF]

, 2020
The onset of frictional motion is mediated by rupture-like slip fronts, which nucleate locally and propagate eventually along the entire interface causing global sliding.
Albertini, Gabriele, Grigoriu, Mircea D., Kammer, David S., Karrer, Simon   +3 more
core   +3 more sources

Effective Slip Lengths for Stokes Flow over Rough, Mixed-Slip Surfaces [PDF]

, 2021
<p>In this thesis, homogenization and perturbation methods are used to derive analytic expressions for effective slip lengths for Stokes flow over rough, mixed-slip surfaces, where the roughness is periodic, and the variation in slip length has the same period.
openaire   +1 more source