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We study experimentally the collision between a sphere falling through a viscous fluid, and a solid plate below. It is known that there is a well-defined threshold Stokes number above which the sphere rebounds from such a collision. Our…

流体动力学 · 物理学 2018-04-18 Sumit Kumar Birwa , G. Rajalakshmi , Rama Govindarajan , Narayanan Menon

From a reanalysis of the published literature, the low-shear viscosity of suspensions of hard spheres is shown to have a dynamic crossover in its concentration dependence, from a stretched exponential at lower concentrations to a power law…

软凝聚态物质 · 物理学 2007-05-23 George D. J. Phillies

We explore the interplay of membrane curvature and nonspecific binding due to excluded-volume effects among colloidal particles inside lipid bilayer vesicles. We trapped submicron spheres of two different sizes inside a pear-shaped,…

软凝聚态物质 · 物理学 2009-10-30 A. D. Dinsmore , D. T. Wong , Philip Nelson , A. G. Yodh

A recent mode coupling theory of higher-order correlation functions is tested on a simple hard-sphere fluid system at intermediate densities. Multi-point and multi-time correlation functions of the densities of conserved variables are…

统计力学 · 物理学 2009-11-07 Ramses van Zon , Jeremy Schofield

Continuum Monte-Carlo simulations at constant pressure are performed on short chain molecules at surfaces. The rodlike chains, consisting of seven effective monomers, are attached at one end to a flat twodimensional substrate. It is found…

凝聚态物理 · 物理学 2007-05-23 R. Hilfer , F. M. Haas

Molecular dynamics simulations are used to study contact between a rigid, nonadhesive, spherical tip with radius of order 30nm and a flat elastic substrate covered with a fluid monolayer of adsorbed chain molecules. Previous studies of bare…

材料科学 · 物理学 2012-01-11 Shengfeng Cheng , Binquan Luan , Mark O. Robbins

We report on a computer simulation and integral equation study of a simple model of patchy spheres, each of whose surfaces is decorated with two opposite attractive caps, as a function of the fraction $\chi$ of covered attractive surface.…

软凝聚态物质 · 物理学 2015-05-18 Achille Giacometti , Fred Lado , Julio Largo , Giorgio Pastore , Francesco Sciortino

We consider the dynamics of finite systems of point masses which move along the real line. We suppose the particles interact pairwise and undergo perfectly inelastic collisions when they collide. In particular, once particles collide, they…

偏微分方程分析 · 数学 2020-07-07 Ryan Hynd

We use discontinuous molecular dynamics and grand-canonical transition-matrix Monte Carlo simulations to explore how confinement between parallel hard walls modifies the relationships between packing fraction, self-diffusivity, partial…

软凝聚态物质 · 物理学 2009-11-13 Jeetain Mittal , Vincent K. Shen , Jeffrey R. Errington , Thomas M. Truskett

Many soft-matter and biophysical systems are composed of monomers which reversibly assemble into rod-like aggregates. The aggregates can then order into liquid-crystal phases if the density is high enough, and liquid-crystal ordering…

软凝聚态物质 · 物理学 2010-07-27 Tatiana Kuriabova , M. D. Betterton , Matthew A. Glaser

Stokes flows with near-touching rigid particles induce near-singular lubrication forces under relative motion, making their accurate numerical treatment challenging. With the aim of controlling the accuracy with a computationally cheap…

数值分析 · 数学 2024-11-26 Anna Broms , Alex H. Barnett , Anna-Karin Tornberg

We develop a new theory for associating fluids with multiple association sites. The theory accounts for small bond angle effects such as steric hindrance, ring formation and double bonding. The theory is validated against monte carlo…

软凝聚态物质 · 物理学 2013-08-19 B. D. Marshall , W. G. Chapman

We use the extension of scaled particle theory (ESPT) presented in the accompanying paper [Stillinger et al. J. Chem. Phys. xxx, xxx (2007)] to calculate numerically pair correlation function of the hard sphere fluid over the density range…

统计力学 · 物理学 2009-11-11 Swaroop Chatterjee , Pablo G. Debenedetti , Frank H. Stillinger

The adhesion of flowing particles and biological cells over fixed collecting surfaces is vitally important in diverse situations and potentially controlled by small-scale surface heterogeneity on the particle. Differences in the behavior of…

软凝聚态物质 · 物理学 2015-06-19 Marina Bendersky , Maria M. Santore , Jeffrey M. Davis

By combining aspects of the coherent and self intermediate scattering functions, measured by dynamical light scattering on a suspension of hard sphere-like particles, we show that the arrest of particle number density fluctuations spreads…

软凝聚态物质 · 物理学 2015-05-13 W. van Megen , V. A. Martinez , G. Bryant

In this article, we study the spreading of droplets of density-matched granular suspensions on the surface of a solid. Bidispersity of the particle size distribution enriches the conclusions drawn from monodisperse experiments by…

软凝聚态物质 · 物理学 2023-01-25 Alice Pelosse , Élisabeth Guazzelli , Matthieu Roché

Binary mixtures of hard-spheres with different diameters and square-well attraction between different particles are studied by theory and Monte Carlo simulations. In our mesoscopic theory, local fluctuations of the volume fraction of the…

软凝聚态物质 · 物理学 2021-10-04 O. Patsahan , A. Meyra , A. Ciach

Adhesion hysteresis can be caused by elastic instabilities that are triggered by surface roughness or chemical heterogeneity. However, the role of these instabilities in adhesion hysteresis remains poorly understood because we lack…

软凝聚态物质 · 物理学 2022-02-09 Antoine Sanner , Lars Pastewka

We have studied the connectivity percolation transition in suspensions of attractive square-well spherocylinders by means of Monte Carlo simulation and connectednes percolation theory. In the 1980s the percolation threshold of slender…

软凝聚态物质 · 物理学 2016-01-20 Mohit Dixit , Hugues Meyer , Tanja Schilling

We propose an improved effective-medium theory to obtain the concentration dependence of the viscosity of particle suspensions at arbitrary volume fractions. Our methodology can be applied, in principle, to any particle shape as long as the…

软凝聚态物质 · 物理学 2010-06-01 I. Santamaria-Holek , Carlos I. Mendoza