نتایج جستجو برای: hard spheres

تعداد نتایج: 166148  

Journal: :Archive for Rational Mechanics and Analysis 2021

We consider the motion of a finite though large number $N$ hard spheres in whole space $\mathbb{R}^n$. Particles move freely until they experience elastic collisions. use our recent theory Compensated Integrability order to estimate how much particles are deviated by Our result, which is expressed terms hodographs, tells us that only $O(N^2)$ collisions significant.

Journal: :Physical review letters 2015
Ran Ni Martien A Cohen Stuart Peter G Bolhuis

Using Brownian dynamics simulations, we systematically study the effective interaction between two parallel hard walls in a 2D suspension of self-propelled (active) colloidal hard spheres, and we find that the effective force between two hard walls can be tuned from a long range repulsion into a long range attraction by changing the density of active particles. At relatively high densities, the...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2005
Antti-Pekka Hynninen Marjolein Dijkstra

We study the phase behavior of hard and soft spheres with a fixed dipole moment using Monte Carlo simulations. The spheres interact via a pair potential that is a sum of a hard-core Yukawa (or screened-Coulomb) repulsion and a dipole-dipole interaction. The system can be used to model colloids in an external electric or magnetic field. Two cases are considered: (i) colloids without charge (or d...

Journal: :The Journal of chemical physics 2005
V Senthil Kumar V Kumaran

The neighbor distribution in hard-sphere and hard-disk fluids is analyzed using Voronoi tessellation. The statistical measures analyzed are the nth neighbor coordination number (Cn), the nth neighbor distance distribution [fn(r)], and the distribution of the number of Voronoi faces (Pn). These statistics are sensitive indicators of microstructure, and they distinguish thermodynamic and annealed...

Journal: :Physical review letters 2011
L Filion M Hermes R Ni E C M Vermolen A Kuijk C G Christova J C P Stiefelhagen T Vissers A van Blaaderen M Dijkstra

We determine the phase diagram of a binary mixture of small and large hard spheres with a size ratio of 0.3 using free-energy calculations in Monte Carlo simulations. We find a stable binary fluid phase, a pure face-centered-cubic (fcc) crystal phase of the small spheres, and binary crystal structures with LS and LS(6) stoichiometries. Surprisingly, we demonstrate theoretically and experimental...

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