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Interactions between an evolving solid and inviscid flow can result in substantial computational complexity, particularly in circumstances involving varied boundary conditions between the solid and fluid phases. Examples of such…

流体动力学 · 物理学 2022-09-30 Emma M. Schmidt , J. Matt Quinlan , Brandon Runnels

The triangle-free process begins with an empty graph on n vertices and iteratively adds edges chosen uniformly at random subject to the constraint that no triangle is formed. We determine the asymptotic number of edges in the maximal…

组合数学 · 数学 2019-09-06 Tom Bohman , Peter Keevash

Interface problems have long been a major focus of scientific computing, leading to the development of various numerical methods. Traditional mesh-based methods often employ time-consuming body-fitted meshes with standard discretization…

数值分析 · 数学 2023-08-09 Xurong Chi , Jingrun Chen , Zhouwang Yang

We present the results of a Direct Numerical Simulation of a particle-laden spatially developing turbulent boundary layer up to Re{\theta} = 2500. Two main features differentiate the behavior of inertial particles in a zero-…

流体动力学 · 物理学 2017-03-31 Gaetano Sardina , Francesco Picano , Philip Schlatter , Luca Brandt , Carlo Massimo Casciola

The interaction between boundary layer turbulence and a porous layer is the cornerstone to the interface engineering. In this study, the spatial resolved transfer entropy is used to assess the asymmetry of the causal interaction next to a…

流体动力学 · 物理学 2023-12-04 Xu Chu , Wenkang Wang , Bernhard Weigand

In this paper we investigate the dynamical behavior of an interface or polymer, in interaction with a distant attractive substrate. The interface is modeled by the graph of a nearest neighbor path with non-negative integer coordinates, and…

概率论 · 数学 2014-01-06 Hubert Lacoin , Augusto Teixeira

We use a discrete-time formulation to study the asymmetric avalanche process [Phys. Rev. Lett. vol. 87, 084301 (2001)] on a finite ring and obtain an exact expression for the average avalanche size of particles as a function of toppling…

统计力学 · 物理学 2009-11-10 A. M. Povolotsky , V. B. Priezzhev , Chin-Kun Hu

Previous work has established the usefulness of the resolvent operator that maps the terms nonlinear in the turbulent fluctuations to the fluctuations themselves. Further work has described the self-similarity of the resolvent arising from…

流体动力学 · 物理学 2017-04-12 A S Sharma , R Moarref , B J McKeon

We consider a dynamical random interface on the infinite lattice $\mathbb{N}$ evolving according to a "corner flip" dynamic above a hard wall, with an additional pinning at the origin. We study the stationary fluctuations under a diffusive…

概率论 · 数学 2025-09-04 Pierre Faugère , Cyril Labbé

We investigate via Monte Carlo numerical simulations and theoretical considerations the outflux of random walkers moving in an interval bounded by an interface exhibiting channels (pores, doors) which undergo an open/close cycle according…

数学物理 · 物理学 2014-01-16 Daniele Andreucci , Dario Bellaveglia , Emilio N. M. Cirillo , Silvia Marconi

We study pattern formation, fluctuations and scaling induced by a growth-promoting active walker on an otherwise static interface. Active particles on an interface define a simple model for energy consuming proteins embedded in the plasma…

统计力学 · 物理学 2019-11-28 Prachi Bisht , Mustansir Barma

Infiltration of anomalously diffusing particles from one material to another through a biased interface is studied using continuous time random walk and Levy walk approaches. Subdiffusion in both systems may lead to a net drift from one…

统计力学 · 物理学 2011-11-03 Nickolay Korabel , Eli Barkai

We give a probabilistic representation of a one-dimensional diffusion equation where the solution is discontinuous at $0$ with a jump proportional to its flux. This kind of interface condition is usually seen as a semi-permeable barrier.…

概率论 · 数学 2016-06-28 Antoine Lejay

We consider the one-dimensional totally asymmetric simple exclusion process (TASEP) with position-dependent hopping rates. The problem is solved,in a mean field/adiabatic approximation, for a general (smooth) form of spatial rate variation.…

统计力学 · 物理学 2011-06-15 R. B. Stinchcombe , S. L. A. de Queiroz

In this paper we present a new and flexible method to show that, in one dimension, various self-repellent random walks converge to self-repellent Brownian motion in the limit of weak interaction after appropriate space-time scaling. Our…

概率论 · 数学 2007-05-23 R. van der Hofstad , F. den Hollander , W. Koenig

When two immiscible liquids that coexist inside a porous medium are drained through an opening, a complex flow takes place in which the interface between the liquids moves, tilts and bends. The interface profiles depend on the physical…

流体动力学 · 物理学 2010-01-14 Alejandro David Mariotti , Elena Brandaleze , Gustavo C. Buscaglia

We establish an invariance principle for a one-dimensional random walk in a dynamical random environment given by a speed-change exclusion process. The jump probabilities of the walk depend on the configuration of the exclusion in a finite…

概率论 · 数学 2018-07-17 Milton Jara , Otávio Menezes

We quantitatively study the transport of E. coli near the walls of confined microfluidic channels, and in more detail along the edges formed by the interception of two perpendicular walls. Our experiments establish the connection between…

We have studied numerically the dynamics of a driven elastic interface in a random medium, focusing on the thermal rounding of the depinning transition and on the behavior in the $T=0$ pinned phase. Thermal effects are quantitatively more…

凝聚态物理 · 物理学 2009-10-22 Lee-Wen Chen , M. Cristina Marchetti

We consider the one-dimensional partially asymmetric exclusion process with random hopping rates, in which a fraction of particles (or sites) have a preferential jumping direction against the global drift. In this case the accumulated…

无序系统与神经网络 · 物理学 2009-11-10 R. Juhasz , L. Santen , F. Igloi