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We study the statistical mechanics of a closed random manifold of fixed area and fluctuating volume, encapsulating a fixed number of noninteracting particles. Scaling analysis yields a unified description of such swollen manifolds,…

软凝聚态物质 · 物理学 2008-08-24 Emir Haleva , Haim Diamant

Two-dimensional (2D) pressure field estimation in molecular dynamics (MD) simulations has been done using three-dimensional (3D) pressure field calculations followed by averaging, which is computationally expensive due to 3D convolutions.…

化学物理 · 物理学 2018-06-18 Sumith Yesudasan , Sibi K. Chacko

We consider the nonlocal multiscale model for surface tension \citep{Tartakovsky2018} as an alternative to the (macroscale) Young-Laplace law. The nonlocal model is obtained in the form of an integral of a molecular-force-like function with…

流体动力学 · 物理学 2019-05-22 Amanda A. Howard , Yongcheng Zhou , Alexandre M. Tartakovsky

Exact and approximate expressions are established for dissipation, the power of the shear stress at the wall and the boundary layer thickness corresponding to the motion of an Oldroyd-B fluid induced by a constantly accelerating plate. The…

数学物理 · 物理学 2015-05-14 Corina Fetecau , C. Fetecau , A. Mahmood , E. Axinte

We propose a self-consistent model taking into account variations in adsorption properties of the adsorbent surface in the process of adsorption--desorption of molecules of gas on it. We introduce a dimensionless coupling parameter that…

材料科学 · 物理学 2009-11-30 A. S. Usenko

The Casimir-Polder-Lifshitz force felt by an atom near the surface of a substrate is calculated out of thermal equilibrium in terms of the dielectric function of the material and of the atomic polarizability. The new force decays like…

统计力学 · 物理学 2007-05-23 Mauro Antezza , Lev P. Pitaevskii , Sandro Stringari

A simple model for viscous liquid dynamics is introduced. Consider the surface of the union of hyper-spheres centered at random positions inside a hypercube with periodic boundary conditions. It is argued and demonstrated by numerical…

软凝聚态物质 · 物理学 2022-06-08 Filip Samuelsen , Lorenzo Costigliola , Thomas B. Schrøder

The dynamics of large eddies in the atmosphere and oceans is described by the surface quasi geostrophic equation, which is reminiscent of the Euler equations. Thermal fronts build up rapidly. Two different numerical methods combined with…

数值分析 · 数学 2025-10-20 Peter Constantin , Qing Nie , Norbert Schorghofer

We begin by studying the surface area of an ellipsoid in n-dimensional Euclidean space as the function of the lengths of the semi-axes. We write down an explicit formula as an integral over the unit sphere in n-dimensions and use this…

度量几何 · 数学 2007-05-23 Igor Rivin

The self-energy of an electron confined between parallel surfaces with arbitrary dielectric properties is calculated. The mechanism for this effect is the surface-induced modification of the fluctuating quantised vacuum field to which the…

量子物理 · 物理学 2018-08-23 Robert Bennett , Stefan Yoshi Buhmann , Claudia Eberlein

In this work we obtain analytical expressions for the non-additivity effects in the dispersive interaction between two atoms and perfectly conducting surface of arbitrary shape in the non-retarded regime. We show that this three bodies…

量子物理 · 物理学 2015-05-27 Reinaldo de Melo e Souza , W. J. M. Kort-Kamp , F. S. S. Rosa , C. Farina

A partially-wetting liquid can deform the underlying elastic substrate upon which it rests. This situation requires the development of theoretical models to describe the wetting forces imparted by the drop onto the solid substrate,…

软凝聚态物质 · 物理学 2014-05-02 Joshua B. Bostwick , Michael Shearer , Karen E. Daniels

Scattering states with LEED asymptotics are calculated for a general non-muffin tin potential, as e.g. for a pseudopotential with a suitable barrier and image potential part. The latter applies especially to the case of low lying conduction…

材料科学 · 物理学 2009-10-30 S. Lorenz , C. Solterbeck , W. Schattke , J. Burmeister , W. Hackbusch

This paper reports numerical studies of a compressible version of the Ising spin glass in two dimensions. Compressibility is introduced by adding a term that couples the spin-spin interactions and local lattice deformations to the standard…

无序系统与神经网络 · 物理学 2013-05-29 Adam H. Marshall

We consider an interface with surface tension that separates a perfectly conducting inviscid fluid from a vacuum. The fluid flow is governed by the equations of ideal compressible magnetohydrodynamics (MHD), while the electric and magnetic…

偏微分方程分析 · 数学 2024-09-24 Yuri Trakhinin

An investigation of the effect of surface diffusion in random deposition model is made by analytical methods and reasoning. For any given site, the extent to which a particle can diffuse is decided by the morphology in the immediate…

软凝聚态物质 · 物理学 2011-12-14 Baisakhi Mal , Subhankar Ray , J. Shamanna

The properties of interfaces in non-equilibrium situations are studied by constructing a density matrix with a space-dependent temperature. The temperature gradient gives rise to new terms in the equation for the order parameter. Surface…

高能物理 - 格点 · 物理学 2009-10-28 Michael C. Ogilvie

We regard the Cauchy problem for a particular Whitham-Boussinesq system modelling surface waves of an inviscid incompressible fluid layer. The system can be seen as a weak nonlocal dispersive perturbation of the shallow water system. The…

偏微分方程分析 · 数学 2020-06-24 Evgueni Dinvay

We show well-posedness for the parabolic Anderson model on $2$-dimensional closed Riemannian manifolds. To this end we extend the notion of regularity structures to curved space, and explicitly construct the minimal structure required for…

概率论 · 数学 2017-02-13 Antoine Dahlqvist , Joscha Diehl , Bruce Driver

We have simulated a system of classical particles confined on the surface of a sphere interacting with a repulsive $r^{-12}$ potential. The same system simulated on a plane with periodic boundary conditions has van der Waals loops in…

统计力学 · 物理学 2009-10-31 Antonio Pérez-Garrido , M. A. Moore