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Using the T-coercivity theory as advocated in [Chesnel, Ciarlet, T -coercivity and continuous Galerkin methods: application to transmission problems with sign changing coefficients (2013)], we propose a new variational formulation of the…

数值分析 · 数学 2024-10-21 Patrick Ciarlet , Erell Jamelot

We first introduce a new model for a two-dimensional gauge-covariant wave equation with space-time white noise. In our main theorem, we obtain the probabilistic global well-posedness of this model in the Lorenz gauge. Furthermore, we prove…

偏微分方程分析 · 数学 2025-02-12 Bjoern Bringmann , Igor Rodnianski

In this study a stabilized finite element method for solving advection-diffusion-reaction equation with spatially variable coefficients has been carried out. Here subgrid scale approach along with algebraic approximation to the sub-scales…

偏微分方程分析 · 数学 2018-12-18 Manisha Chowdhury , B. V. Rathish Kumar

Stochastic solutions are obtained for the Maxwell-Vlasov equation in the approximation where magnetic field fluctuations are neglected and the electrostatic potential is used to compute the electric field. This is a reasonable approximation…

等离子体物理 · 物理学 2015-05-13 R. Vilela Mendes

We outline a regular way for solving Maxwell's equations. We take, as the starting point, the notion of vector potentials. The rationale for introducing this notion in electrodynamics is that the set of Maxwell's equations is seemingly…

经典物理 · 物理学 2022-05-04 Andrew E Chubykalo , Augusto Espinoza , B P Kosyakov

In this paper we study the homogenization of unsteady Stokes type equations in the periodic setting. The usual Laplace operator involved in the classical Stokes equations is here replaced by a linear elliptic differential operator of…

偏微分方程分析 · 数学 2011-01-17 Lazarus Signing

The phase-field crystal equation, a parabolic, sixth-order and nonlinear partial differential equation, has generated considerable interest as a possible solution to problems arising in molecular dynamics. This is because the phase-field…

数学物理 · 物理学 2015-07-29 Philippe Vignal , Lisandro Dalcin , Donald L. Brown , Nathan Collier , Victor M. Calo

We consider the time-harmonic electromagnetic transmission problem for the unit sphere. Appealing to a vector spherical harmonics analysis, we prove the first stability result of the local multiple trace formulation (MTF) for…

数值分析 · 数学 2022-03-30 Alan Ayala , Xavier Claeys , Paul Escapil-Inchauspé , Carlos Jerez-Hanckes

This paper proposes the application of the waveform relaxation method to the homogenization of multiscale magnetoquasistatic problems. In the monolithic heterogeneous multiscale method, the nonlinear macroscale problem is solved using the…

数值分析 · 数学 2016-10-18 Innocent Niyonzima , Christophe Geuzaine , Sebastian Schöps

We consider the well-posedness of the initial value problem for Einstein-Maxwell theory modified by higher derivative effective field theory corrections. Field redefinitions can be used to bring the leading parity-symmetric 4-derivative…

广义相对论与量子宇宙学 · 物理学 2022-11-23 Iain Davies , Harvey S. Reall

The differential form of the Maxwell's equations was first derived based on an assumption that the media are stationary, which is the foundation for describing the electro-magnetic coupling behavior of a system. For a general case in which…

经典物理 · 物理学 2022-08-29 Zhong Lin Wang

This paper is devoted to the study of the nonlinear stability of the rarefaction waves of the Vlasov-Poisson-Boltzmann system with slab symmetry in the case where the electron background density satisfies an analogue of the Boltzmann…

偏微分方程分析 · 数学 2014-05-13 Renjun Duan , Shuangqian Liu

The covariant formulation of Maxwell's equations can be expressed in a form independent of the usual systems of units by introducing the constants alpha, beta and gamma into these equations. Maxwell's equations involving these constants are…

经典物理 · 物理学 2009-01-05 Jose A. Heras , G. Baez

This paper addresses the variational multiscale stabilization of standard finite element methods for linear partial differential equations that exhibit multiscale features. The stabilization is of Petrov-Galerkin type with a standard finite…

数值分析 · 数学 2015-10-21 Daniel Peterseim

Variational minimization of tensor network states enables the exploration of low energy states of lattice gauge theories. However, the exact numerical evaluation of high-dimensional tensor network states remains challenging in general. In…

量子物理 · 物理学 2020-10-12 Patrick Emonts , Mari Carmen Bañuls , J. Ignacio Cirac , Erez Zohar

In this paper we consider an abstract Cauchy problem for a Maxwell system modelling electromagnetic fields in the presence of an interface between optical media. The electric polarization is in general time-delayed and nonlinear, turning…

偏微分方程分析 · 数学 2023-11-21 Tomáš Dohnal , Mathias Ionescu-Tira , Marcus Waurick

In this paper, we consider numerical approximations for solving the nonlinear magneto-hydrodynamical system, that couples the Navier-Stokes equations and Maxwell equations together. A challenging issue to solve this model numerically is…

数值分析 · 数学 2017-11-28 Guodong Zhang , Xiaoming He , Xiaofeng Yang

In this work we discuss the numerical discretization of the time-dependent Maxwell's equations using a fully explicit leap-frog type discontinuous Galerkin method. We present a sufficient condition for the stability, for cases of typical…

数值分析 · 数学 2017-04-26 Adérito Araújo , Sílvia Barbeiro , Maryam Khaksar Ghalati

We have developed a new fully anisotropic 3D FDTD Maxwell solver for arbitrary electrically and magnetically anisotropic media for piecewise constant electric and magnetic materials that are co-located over the primary computational cells.…

数值分析 · 数学 2018-03-05 J. Nehls , C. Dineen , J. Liu , C. Poole , M. Brio , J. V. Moloney

The propagation of electromagnetic waves in general media is modeled by the time-dependent Maxwell's partial differential equations (PDEs), coupled with constitutive laws that describe the response of the media. In this work, we focus on…

数值分析 · 数学 2017-10-11 Vrushali A. Bokil , Yingda Cheng , Yan Jiang , Fengyan Li