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We establish the well-posedness of a coupled micro-macro parabolic-elliptic system modeling the interplay between two pressures in a gas-liquid mixture close to equilibrium that is filling a porous media with distributed microstructures.…

偏微分方程分析 · 数学 2018-04-23 Martin Lind , Adrian Muntean , Omar Richardson

We consider a coupled system of Navier-Stokes and Nernst-Planck equations, describing the evolution of the velocity and the concentration fields of dissolved constituents in an electrolyte solution. Motivated by recent applications in the…

偏微分方程分析 · 数学 2012-06-12 Dieter Bothe , André Fischer , Jürgen Saal

Consider the (simplified) Leslie-Erickson model for the flow of nematic liquid crystals in a bounded domain $\Omega \subset \mathbb{R}^n$ for n > 1$. This article develops a complete dynamic theory for these equations, analyzing the system…

偏微分方程分析 · 数学 2013-02-20 Matthias Hieber , Manuel Nesensohn , Jan Prüss , Katharina Schade

This work investigates the semilinear wave equation featuring the displacement dependent term $\sigma(u)\partial_t u $ and nonlinearity $f(u)$. By developing refined space-time a priori estimates under extended ranges of the nonlinearity…

偏微分方程分析 · 数学 2025-05-13 Cuncai Liu , Fengjuan Meng , Chang Zhang

We consider the Hartree equation for infinitely many electrons with a constant external magnetic field. For the system, we show a local well-posedness result when the initial data is the pertubation of a Fermi sea, which is a non-trace…

数学物理 · 物理学 2020-03-17 Xin Dong

Fluid flows in coupled systems consisting of a free-flow region and the adjacent porous medium appear in a variety of environmental settings and industrial applications. In many applications, fluid flow is non-parallel to the fluid-porous…

偏微分方程分析 · 数学 2021-04-07 Elissa Eggenweiler , Marco Discacciati , Iryna Rybak

We present a unified framework to construct well-posed formulations for large classes of linear operator equations including elliptic, parabolic and hyperbolic partial differential equations. This general approach incorporates known weak…

数值分析 · 数学 2025-08-08 Moritz Feuerle , Richard Löscher , Olaf Steinbach , Karsten Urban

In this paper we establish well posedness of the Neumann problem with boundary data in $L^2$ or the Sobolev space $\dot W^2_{-1}$, in the half space, for linear elliptic differential operators with coefficients that are constant in the…

偏微分方程分析 · 数学 2017-03-22 Ariel Barton , Steve Hofmann , Svitlana Mayboroda

We consider a nonlinear fourth order in space partial differential equation arising in the context of the modeling of nonlinear acoustic wave propagation in thermally relaxing viscous fluids. We use the theory of operator semigroups in…

偏微分方程分析 · 数学 2015-09-25 Rainer Brunnhuber , Barbara Kaltenbacher

This paper is concerned with the inverse scattering problem involving the time-domain elastic wave equations in a bounded $d$-dimensional domain. First, an explicit reconstruction formula for the density is established by means of the…

偏微分方程分析 · 数学 2023-01-20 Bochao Chen , Yixian Gao , Shuguan Ji , Yang Liu

This paper considers a family of active scalar equations which modify the generalized surface quasi-geostrophic (gSQG) equations through its constitutive law and a dissipative perturbation. These modifications are characteristically mild in…

偏微分方程分析 · 数学 2025-12-09 Anuj Kumar , Vincent R. Martinez

We consider an elastic/viscoelastic transmission problem for the Bresse system with fully Dirichlet or Dirichlet-Neumann-Neumann boundary conditions. The physical model consists of three wave equations coupled in certain pattern. The system…

偏微分方程分析 · 数学 2022-02-23 Stéphane Gerbi , Chiraz Kassem , Ali Wehbe

We prove existence and uniqueness of strong (pointwise) solutions to a linear nonlocal strongly coupled hyperbolic system of equations posed on all of Euclidean space. The system of equations comes from a linearization of a nonlocal model…

偏微分方程分析 · 数学 2019-06-26 Tadele Mengesha , James M. Scott

Consider an operator equation (*) $B(u)-f=0$ in a real Hilbert space. Let us call this equation ill-posed if the operator $B'(u)$ is not boundedly invertible, and well-posed otherwise. The DSM (dynamical systems method) for solving equation…

泛函分析 · 数学 2009-11-10 A. G. Ramm

The Nernst-Planck-Navier-Stokes system models electrodiffusion of ions in a fluid. We prove global existence of solutions in bounded domains in three dimensions with either blocking (no-flux) or uniform selective (special Dirichlet)…

偏微分方程分析 · 数学 2020-08-25 Peter Constantin , Mihaela Ignatova , Fizay-Noah Lee

The goal of this note is to provide a theoretical explanation for the saturation of the drag coefficient in strong wind conditions. The hydrodynamic model under consideration takes into account the important effects of airborne droplets of…

流体动力学 · 物理学 2022-12-12 Michael Stiassnie , David Andrade

We investigate stability properties of indirectly damped systems of evolution equations in Hilbert spaces, under new compatibility assumptions. We prove polynomial decay for the energy of solutions and optimize our results by interpolation…

最优化与控制 · 数学 2014-01-29 F. Alabau-Boussouira , P. Cannarsa , R. Guglielmi

We employ a port-Hamiltonian approach to model nonlinear rigid multibody systems subject to both position and velocity constraints. Our formulation accommodates Cartesian and redundant coordinates, respectively, and captures kinematic as…

动力系统 · 数学 2025-04-25 Thomas Berger , René Hochdahl , Timo Reis , Robert Seifried

We investigate a class of scalar conservation laws on manifolds driven by multiplicative Gaussian (Ito) noise. The Cauchy problem defined on a Riemannian manifold is shown to be well-posed. We prove existence of generalized kinetic…

偏微分方程分析 · 数学 2019-06-28 Luca Galimberti , Kenneth H. Karlsen

A class of non-autonomous differential inclusions in a Hilbert space setting is considered. The well-posedness for this class is shown by establishing the mappings involved as maximal monotone relations. Moreover, the causality of the so…

偏微分方程分析 · 数学 2014-03-07 Sascha Trostorff , Maria Wehowski