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We solve the nonlinear Poisson-Boltzmann equation for two parallel and likely charged plates both inside a symmetric elecrolyte, and inside a 2 : 1 asymmetric electrolyte, in terms of Weierstrass elliptic functions. From these solutions we…

经典物理 · 物理学 2013-05-29 Xiangjun Xing

In this paper, we establish the existence of probabilistically strong, measure-valued solutions for the stochastic incompressible Navier--Stokes equations and prove their convergence, in the vanishing viscosity limit, to probabilistically…

偏微分方程分析 · 数学 2026-01-30 Benjamin Gess , Robert Lasarzik

We study the Stokes--Poisson--Boltzmann equations with Dirichlet and Navier boundary conditions. The system consists of the incompressible Stokes equations coupled with a nonlinear Poisson--Boltzmann equation through electrostatic forcing…

数值分析 · 数学 2026-04-15 Ayush Agrawal , Aparna Bansal , D. N. Pandey

A right continuous Markov chain is introduced in the noise terms of the three-dimensional stochastic Navier-Stokes equation, and we call such stochastic system as stochastic Navier-Stokes equation with Markov switching. In the present…

概率论 · 数学 2026-01-07 Po-Han Hsu

We consider an unregularized optimal control problem subject to the steady-state Navier-Stokes equations. We derive the existence of optimal solutions and prove first- and second-order optimality conditions. To approximate solutions to the…

数值分析 · 数学 2026-05-26 Francisco Fuica , Nicolai Jork

In this article, a suite of physically inconsistent properties of the Navier-Stokes equations, associated with the lack of mass diffusion and the definition of velocity, are presented. We show that these inconsistencies are consequences of…

流体动力学 · 物理学 2018-01-09 Magnus Svärd

We propose a novel efficient algorithm to solve Poisson equation in irregular two dimensional domains for electrostatics. It can handle Dirichlet, Neumann or mixed boundary problems in which the filling media can be homogeneous or…

数学物理 · 物理学 2013-06-17 Zu-Hui Ma , Weng Cho Chew , Li Jun Jiang

A constructive numerical approximation of the two-dimensional unsteady stochastic Navier-Stokes equations of an incompressible fluid is proposed via a pseudo-compressibility technique involving a parameter $\epsilon$. Space and time are…

数值分析 · 数学 2022-05-02 Jad Doghman

In this paper we review some recent results concerning inverse problems for thin elastic plates. The plate is assumed to be made by non-homogeneous linearly elastic material belonging to a general class of anisotropy. A first group of…

偏微分方程分析 · 数学 2012-09-28 Antonino Morassi , Edi Rosset , Sergio Vessella

In this paper we investigate the stress concentration problem that occurs when two convex rigid particles are closely immersed in a fluid flow. The governing equations for the fluid flow are the stationary incompressible Navier-Stokes…

偏微分方程分析 · 数学 2024-11-26 Haigang Li , Peihao Zhang

In this paper, we consider weak solutions of the Euler-Lagrange equation to a variational energy functional modeling the geometrically nonlinear Cosserat micropolar elasticity of continua in dimension three, which is a system coupling…

偏微分方程分析 · 数学 2020-01-01 Yimei Li , Changyou Wang

A variational approach is used to develop a robust numerical procedure for solving the nonlinear Poisson-Boltzmann equation. Following Maggs et al., we construct an appropriate constrained free energy functional, such that its…

软凝聚态物质 · 物理学 2020-04-29 M. Baptista , R. Schmitz , B. Duenweg

This paper is concerned with pullback dynamics of 3D Navier-Stokes equations with variable viscosity and subject to time-dependent external forces. Our main result establishes the existence of finite-dimensional pullback attractors in a…

动力系统 · 数学 2019-01-23 Xin-Guang Yang , Baowei Feng , Shubin Wang , To Fu Ma , Yongjin Lu

We prove the existence of weak solutions to steady, compressible non-Newtonian Navier-Stokes system on a bounded, two- or three-dimensional domain. Assuming the viscous stress tensor is monotone satisfying a power-law growth with power $r$…

偏微分方程分析 · 数学 2024-01-11 Cosmin Burtea , Maja Szlenk

We construct solutions to the randomly-forced Navier--Stokes--Poisson system in periodic three-dimensional domains or in the whole three-dimensional Euclidean space. These solutions are weak in the sense of PDEs and also weak in the sense…

偏微分方程分析 · 数学 2020-05-04 Donatella Donatelli , Pierangelo Marcati , Prince Romeo Mensah

An analytic, asymptotic approximation of the nonlinear steady-state equations for viscoelastic creeping flow, modeled by the Oldroyd-B equations with polymer stress diffusion, is derived. Near the extensional stagnation point the flow…

流体动力学 · 物理学 2016-01-14 Joseph A. Biello , Becca Thomases

Pulvirenti and Toscani introduced an equation which extends the Kac caricature of a Maxwellian gas to inelastic particles. We show that the probability distribution, solution of the relative Cauchy problem, converges weakly to a probability…

概率论 · 数学 2015-06-04 Ester Gabetta , Eugenio Regazzini

This work is a continuation of the analysis first presented in Cheung & Zaki (2014). In that study, the combination matrix was introduced as a means to tractably handle the nonlinear terms in the spectral domain. In this work, a different…

流体动力学 · 物理学 2016-05-17 Lawrence C. Cheung , Tamer A. Zaki

Reciprocal space methods for solving Poisson's equation for finite charge distributions are investigated. Improvements to previous proposals are presented, and their performance is compared in the context of a real-space density functional…

计算物理 · 物理学 2007-05-23 Alberto Castro , Angel Rubio , M. J. Stott

We consider the inverse resonance problem in one-dimensional scattering theory. The scattering matrix consists of $2\times 2$ entries of meromorphic functions, which are quotients of certain Fourier transform. The resonances are expressed…

谱理论 · 数学 2025-08-18 Lung-Hui Chen