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We show that, in general, any complex weakly nonlinear highly multimode system can reach thermodynamic equilibrium that is characterized by a unique temperature and chemical potential. The conditions leading to either positive or negative…

A simplified transient energy-transport system for semiconductors subject to mixed Dirichlet-Neumann boundary conditions is analyzed. The model is formally derived from the non-isothermal hydrodynamic equations in a particular vanishing…

偏微分方程分析 · 数学 2012-06-26 Ansgar Jüngel , René Pinnau , Elisa Röhrig

In this work a system of non-linear elliptic equations is considered, where the non-linear term is the sum of a quadratic form and a Sobolev sub-critical term. An extra assumption is introduced on the sub-critical term, which is minimal…

偏微分方程分析 · 数学 2023-01-02 Daniele Garrisi

We consider Heisenberg-Euler-type model of nonlinear electrodynamics with two parameters. Heisenberg-Euler electrodynamics is a particular case of this model. Corrections to Coulomb's law at $r\rightarrow\infty$ are obtained and energy…

综合物理 · 物理学 2017-05-25 S. I. Kruglov

We develop a continuum theory for thermoelectric bodies following the framework of continuum mechanics and conforming to general principles of thermodynamics. For steady states, the governing equations for local fields are intrinsically…

材料科学 · 物理学 2012-03-05 Liping Liu

We treat the problem of the approach to thermal equilibrium by only resorting to quantum dynamics of an isolated macroscopic system. Inspired by the two important works in 2009 and in 1929, we have noted that a condition we call…

量子物理 · 物理学 2015-03-13 Hal Tasaki

A statistical thermodynamic development is given of a new implicit solvent model that avoids the traditional system size limitations of computer simulation of macromolecular solutions with periodic boundary conditions. This implicit solvent…

化学物理 · 物理学 2009-10-31 Lawrence R. Pratt , Susan B. Rempe

This paper presents a thermodynamically consistent model for multicomponent electrolyte solutions. The first part of this paper derives the general governing equations for nonequilibrium systems within the theory of nonequilibrium…

偏微分方程分析 · 数学 2016-05-25 Matthias Herz , Peter Knabner

We establish three partial differential equation models describing the thermodynamics of the fluid, by combining the energetic variational approach, appropriate constitutive relations, and classical thermodynamics laws. What is more, by…

偏微分方程分析 · 数学 2020-11-23 Ning-An Lai , Chun Liu , Andrei Tarfulea

This paper analyzes a transient thermo-electromagnetic problem arising in the modeling of induction heating processes. Unlike previous studies that focused on steady-state scenarios, we consider a time-dependent thermal problem coupled with…

数值分析 · 数学 2026-04-29 D. Gómez , B. López-Rodríguez , P. Salgado , P. Venegas

In this paper we obtain necessary conditions and sufficient conditions on the initial data for the solvability of the Cauchy problem $$ \partial_t u+(-\Delta)^{\frac{\theta}{2}}u=u^p,\quad x\in{\bf R}^N,\,\,t>0, \qquad u(0)=\mu\ge…

偏微分方程分析 · 数学 2016-07-06 Kotaro Hisa , Kazuhiro Ishige

In this paper we present sufficient conditions for the existence of heteroclinic or homoclinic solutions for second order coupled systems of differential equations on the real line. We point out that it is required only conditions on the…

动力系统 · 数学 2020-04-01 Robert de Sousa , Feliz Minhós

We study the influence of the factor of electron-ion collisions on the solution of the Cauchy problem in the one-dimensional relativistic model of cold plasma and show that, depending on their intensity and initial data, two scenarios are…

数学物理 · 物理学 2021-09-29 Olga S. Rozanova , Eugeniy V. Chizhonkov

One method available to prove the Schauder estimates is Neil Trudinger's method of mollification. In the case of second order elliptic equations, the method requires little more than mollification and the solid mean value inequality for…

偏微分方程分析 · 数学 2012-04-05 Charles Baker

Some systems of nonlinear wave equations admit global solutions for all sufficiently small initial data, while others do not. The (classical) null condition guarantees that such a result holds, but it is too strong to capture certain…

偏微分方程分析 · 数学 2019-06-06 Joseph Keir

For the 3-D quadratic quasilinear wave equations in exterior domains with Dirichlet or Neumann boundary conditions, the global existence or the maximal existence time of small data smooth solutions have been established in the past.…

偏微分方程分析 · 数学 2026-02-17 Fei Hou , Huicheng Yin , Meng Yuan

This work mainly focuses on the nonlinear Einstein-Euler-Heisenberg theory and its applications from various aspects. Firstly, thermodynamic variables are analytically determined via Smarr formula for a four dimensional spherically…

广义相对论与量子宇宙学 · 物理学 2025-07-14 Huriye Gürsel , Mert Mangut , Erdem Sucu

We study qualitative properties of initial traces of nonnegative solutions to a semilinear heat equation in a smooth domain under the Dirichlet boundary condition. Furthermore, for the corresponding Cauchy--Dirichlet problem, we obtain…

偏微分方程分析 · 数学 2024-12-10 Kotaro Hisa , Kazuhiro Ishige

We consider a quasilinear system of hyperbolic equations that describes plane one-dimensional non-relativistic oscillations of electrons in a cold plasma with allowance for electron-ion collisions. Accounting for collisions leads to the…

数学物理 · 物理学 2021-01-08 Olga Rozanova , Eugeniy Chizhonkov , Maria Delova

Nonlinear heat equations in two dimensions with singular initial data are studied. In recent works nonlinearities with exponential growth of Trudinger-Moser type have been shown to manifest critical behavior: well-posedness in the…

偏微分方程分析 · 数学 2019-03-20 Norisuke Ioku , Bernhard Ruf , Elide Terraneo