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We establish a weak-strong uniqueness principle for the two-phase Mullins-Sekerka equation in the plane: As long as a classical solution to the evolution problem exists, any weak De Giorgi type varifold solution (see for this notion the…

偏微分方程分析 · 数学 2024-04-04 Julian Fischer , Sebastian Hensel , Tim Laux , Theresa M. Simon

We establish the boundedness of solutions of reaction-diffusion systems with quadratic (in fact slightly super-quadratic) reaction terms that satisfy a natural entropy dissipation property, in any space dimension N>2. This bound imply the…

偏微分方程分析 · 数学 2017-09-19 Cristina Caputo , Thierry Goudon , Alexis Vasseur

In this article we propose a unified framework in order to study reaction-diffusion systems containing self- and cross-diffusion using a free energy approach. This framework naturally leads to the formulation of an energy law, and to a…

计算物理 · 物理学 2021-10-12 Benjamin Aymard

The dynamics of multicomponent gas mixtures with vanishing barycentric velocity is described by Maxwell-Stefan equations with mass diffusion and heat conduction. The equations consist of the mass and energy balances, coupled to an algebraic…

偏微分方程分析 · 数学 2023-04-03 Stefanos Georgiadis , Ansgar Jüngel

Very often, models in biology, chemistry, physics, and engineering are systems of polynomial or power-law ordinary differential equations, arising from a reaction network. Such dynamical systems can be generated by many different reaction…

动力系统 · 数学 2020-01-01 Gheorghe Craciun , Jiaxin Jin , Polly Y. Yu

We give a survey of recent results on weak-strong uniqueness for compressible and incompressible Euler and Navier-Stokes equations, and also make some new observations. The importance of the weak-strong uniqueness principle stems, on the…

偏微分方程分析 · 数学 2017-05-12 Emil Wiedemann

In this paper we consider stochastic differential equations with discontinuous diffusion coefficient of varying sign, for which weak existence and uniqueness holds but strong uniqueness fails. We introduce the notion of $\varphi $-strong…

概率论 · 数学 2013-09-09 Mihai N. Pascu

We consider the stochastic continuity equation associated to an It\^{o} diffusion with irregular drift and diffusion coefficients. We give regularity conditions under which weak solutions are renormalized in the sense of DiPerna/Lions, and…

概率论 · 数学 2017-10-18 Samuel Punshon-Smith

We prove nonuniqueness of weak solutions to multi-dimensional generalisation of the Aw-Rascle model of vehicular traffic. Our generalisation includes the velocity offset in a form of gradient of density function, which results in a…

偏微分方程分析 · 数学 2022-08-05 Nilasis Chaudhuri , Eduard Feireisl , Ewelina Zatorska

We establish global-in-time existence results for thermodynamically consistent reaction-(cross-)diffusion systems coupled to an equation describing heat transfer. Our main interest is to model species-dependent diffusivities, while at the…

偏微分方程分析 · 数学 2022-02-11 Julian Fischer , Katharina Hopf , Michael Kniely , Alexander Mielke

Chemical and biochemical reactions can exhibit surprisingly different behaviours, ranging from multiple steady-state solutions to oscillatory solutions and chaotic behaviours. These types of systems are often modelled by a system of…

偏微分方程分析 · 数学 2025-07-03 Erika Hausenblas , Michael A. Högele , Tesfalem A. Tegegn

The continuous dependence on the initial data and consequently the uniqueness of bounded weak solutions to a class of triangular reaction-cross-diffusion equations is shown. The class includes two-species doubly degenerate equations for…

偏微分方程分析 · 数学 2025-09-29 Xiuqing Chen , Bang Du , Ansgar Jüngel

We consider quasi-static poroelastic systems with incompressible constituents. The nonlinear permeability is taken to be dependent on solid dilation, and physical types of boundary conditions (Dirichlet, Neumann, and mixed) for the fluid…

偏微分方程分析 · 数学 2022-02-23 Lorena Bociu , Boris Muha , Justin T. Webster

Singular or weak solutions of the incompressible Euler equations have been hypothesized to account for anomalous dissipation at very high Reynolds numbers and, in particular, to explain the d'Alembert paradox of non-vanishing drag. A…

流体动力学 · 物理学 2025-05-06 Gregory L. Eyink , Hao Quan

The main goal of the paper is to define and use a condition sufficient to choose a unique solution to conservation law systems with a singular measure in initial data. Different approximations can lead to solutions with different…

偏微分方程分析 · 数学 2020-11-10 Marko Nedeljkov , Sanja Ružičić

Reaction networks can display a wide array of dynamics. However, it is possible for different reaction networks to display the same dynamics. This phenomenon is called dynamical equivalence and makes network identification a hard problem to…

动力系统 · 数学 2022-05-03 Abhishek Deshpande

In this article, we study a thermodynamically consistent thermo-visco-elastic model describing the balance of internal energy in a heat-conducting inelastic body. In the considered problem, the temperature dependence appears in both the…

偏微分方程分析 · 数学 2025-11-13 Tomasz Cieślak , Sebastian Owczarek , Karolina Wielgos

We propose a new approach to models of general compressible viscous fluids based on the concept of dissipative solutions. These are weak solutions satisfying the underlying equations modulo a defect measure. A dissipative solution coincides…

偏微分方程分析 · 数学 2020-01-01 Anna Abbatiello , Eduard Feireisl , Antonin Novotny

We consider a parabolic relaxation model for the compressible Navier-Stokes-Korteweg equations in the isothermal framework. This system depends on the relaxation parameters $\alpha,\beta>0$ and approximates formally solutions of the…

偏微分方程分析 · 数学 2025-12-11 Nilasis Chaudhuri , Christian Rohde , Florian Wendt

We study a fractional cross-diffusion system that describes the evolution of multi-species populations in the regime of large-distance interactions in a bounded domain. We prove existence and weak-strong uniqueness results for the…

偏微分方程分析 · 数学 2026-01-19 Nicola De Nitti , Nicola Zamponi