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We consider a prototypical nonlinear parabolic equation whose flux has three distinguished features: it is nonlinear with respect to both the unknown and its gradient, it is homogeneous, and it depends only on the direction of the gradient.…

偏微分方程分析 · 数学 2021-09-24 Lorenzo Giacomelli , Salvador Moll , Francesco Petitta

We study a one-dimensional cross-diffusion system for two interacting populations on the torus, with a fast-diffusion law with exponent $0< \alpha\le 1$ and different external potentials. For arbitrary non-negative $L^{1}$ initial data with…

偏微分方程分析 · 数学 2025-10-10 Charles Elbar , Filippo Santambrogio

We consider the Cauchy problem for one-dimensional p-system with damping of space-dependent coefficient. This system models the compressible flow through porous media in the Lagrangean coordinate. Our concern is an asymptotic behavior of…

偏微分方程分析 · 数学 2023-07-13 Akitaka Matsumura , Kenji Nishihara

Two-scale homogenization limits of parabolic cross-diffusion systems in a heterogeneous medium with no-flux boundary conditions are proved. The heterogeneity of the medium is reflected in the diffusion coefficients or by the perforated…

偏微分方程分析 · 数学 2018-10-18 Ansgar Juengel , Mariya Ptashnyk

Although an intimate relation between entropy and diffusion has been advocated for many years and even seems to have been verified in theory and experiments, a quantitatively reliable study, and any derivation of an algebraic relation…

统计力学 · 物理学 2020-07-22 Subhajit Acharya , Biman Bagchi

We study a nonlinear, degenerate cross-diffusion model which involves two densities with two different drift velocities. A general framework is introduced based on its gradient flow structure in Wasserstein space to derive a notion of…

偏微分方程分析 · 数学 2018-03-20 Inwon Kim , Alpár R. Mészáros

The sharp range of Sobolev spaces is determined in which the Cauchy problem for the classical Zakharov system is well-posed, which includes existence of solutions, uniqueness, persistence of initial regularity, and real-analytic dependence…

偏微分方程分析 · 数学 2024-03-11 Timothy Candy , Sebastian Herr , Kenji Nakanishi

It is well known that the similar universal behavior of infinite-size (bulk) systems of different nature requires the same basic conditions: space dimensionality; number components of order parameter; the type (short- or long-range) of the…

In this paper, we study the Cauchy problem to the 3D fractional compressible isentropic generalized Navier-Stokes equations for viscous compressible fluid with one Levy diffusion process. We obtain the existence and uniqueness of global…

偏微分方程分析 · 数学 2024-07-03 Mengqian Liu , Lei Niu , Zhigang Wu

In recent years, the global existence of classical solutions to the Cauchy problem for 2D incompressible viscous MHD equations without magnetic diffusion has been proved in \cite{Ren,TZhang}, under the assumption that initial data is close…

偏微分方程分析 · 数学 2025-05-22 Shijin Ding , Ronghua Pan , Yi Zhu

The uniqueness of bounded weak solutions to strongly coupled parabolic equations in a bounded domain with no-flux boundary conditions is shown. The equations include cross-diffusion and drift terms and are coupled selfconsistently to the…

偏微分方程分析 · 数学 2017-06-28 Xiuqing Chen , Ansgar Jüngel

Studied in this paper is the well-posedness of the Cauchy problem for the coupled KdV-KdV systems \[ u_t+a_1u_{xxx} = c_{11}uu_x+c_{12}vv_x+d_{11}u_{x}v+d_{12}uv_{x}, \quad u(x,0)= u_0(x) \] \[ v_t+a_2v_{xxx}= c_{21}uu_x+c_{22}vv_x…

偏微分方程分析 · 数学 2023-02-16 Xin Yang , Bing-Yu Zhang

In this paper, we study the Cauchy problem for a nonlinear wave equation with frictional and viscoelastic damping terms. As is pointed out by [8], in this combination, the frictional damping term is dominant for the viscoelastic one for the…

偏微分方程分析 · 数学 2016-05-25 Ryo Ikehata , Hiroshi Takeda

In this paper, we provide well-posedness results for nonlinear parabolic PDEs given by reaction-diffusion equations describing the concentration of oxygen in encapsulated cells. The cells are described in terms of a core and a shell, which…

偏微分方程分析 · 数学 2024-07-08 Yuma Nakamura , Kharisma Surya Putri , Alef Sterk , Thomas Geert de Jong

Starting from a particle model describing self-propelled particles interacting through nematic alignment, we derive a macroscopic model for the particle density and mean direction of motion. We first propose a mean-field kinetic model of…

数学物理 · 物理学 2019-10-08 Pierre Degond , Sara Merino-Aceituno

This paper is concerned with the three-dimensional equations of a simplified hydrodynamic flow modeling the motion of compressible, nematic liquid crystal materials. The authors establish the global existence of classical solution to the…

偏微分方程分析 · 数学 2012-04-24 Jing Li , Zhonghai Xu , Jianwen Zhang

In this paper, we establish the existence, uniqueness and stability results for the obstacle problem associated with a degenerate nonlinear diffusion equation perturbed by conservative gradient noise. Our approach revolves round introducing…

概率论 · 数学 2025-04-17 Kai Du , Ruoyang Liu

This paper is concerned with asymptotic persistence, extinction and spreading properties for non-cooperative Fisher-KPP systems with space-time periodic coefficients. Results are formulated in terms of a family of generalized principal…

偏微分方程分析 · 数学 2025-01-14 Léo Girardin

We investigate global well-posedness to the Cauchy problem of three-dimensional compressible viscous and heat-conducting micropolar fluid equations with zero density at infinity. By delicate energy estimates, we establish global existence…

偏微分方程分析 · 数学 2022-03-15 Yang Liu , Xin Zhong

We prove maximal Schauder regularity for solutions to elliptic systems and Cauchy problems, in the space $C_b(\mathbb{R}^d;\mathbb{R}^m)$ of bounded and continuous functions, associated to a class of nonautonomous weakly coupled…

偏微分方程分析 · 数学 2022-01-03 Davide Addona , Luca Lorenzi