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In the analysis of the long-time behaviour of two-dimensional incompressible viscous fluids, Oseen vortices play a major role as attractors of any homogeneous solution with integrable initial vorticity. As a first step in the study of the…

偏微分方程分析 · 数学 2007-05-23 L. Miguel Rodrigues

Let ${\bf M}$ be a compact Riemannian manifold and the metrics $g=g(t)$ evolve by the Ricci flow. We prove the following result. The Sobolev imbedding by Aubin or Hebey, perturbed by a scalar curvature term and modulo sharpness of…

微分几何 · 数学 2007-08-29 Qi S. Zhang

We obtain critical embeddings and the concentration-compactness principle for the anisotropic variable exponent Sobolev spaces. As an application of these results,we confirm the existence of and find infinitely many nontrivial solutions for…

偏微分方程分析 · 数学 2024-03-27 N. Chems Eddine , M. A. Ragusa , D. D. Repovš

We study the existence, uniqueness as well as regularity issues for the two-dimensional incompressible Boussinesq equations with temperature-dependent thermal and viscosity diffusion coefficients in general Sobolev spaces. The optimal…

偏微分方程分析 · 数学 2021-12-08 Zihui He , Xian Liao

This paper is a continuation of the works in \cite{Euler} and \cite{NS}, where the authors have established the global existence of smooth compressible flows in infinitely expanding balls for inviscid gases and viscid gases, respectively.…

偏微分方程分析 · 数学 2017-06-06 Huicheng Yin , Wenbin Zhao

We present a local existence result for the three dimensional incompressible Euler equations. The solution is constructed using a formulation of the equations as an active vector system in Eulerian coordinates. The formulation employs the…

偏微分方程分析 · 数学 2007-05-23 P. Constantin

We show that there are no new consistent cosmological perfect fluid solutions when in an open neighbourhood ${\cal U}$ of an event the fluid kinematical variables and the electric and magnetic Weyl curvature are all assumed rotationally…

广义相对论与量子宇宙学 · 物理学 2014-11-17 Nazeem Mustapha , George F R Ellis , Henk van Elst , Mattias Marklund

The existence and uniqueness of the local strong solution to the three-dimensional compressible viscoelastic fluids near the equilibrium is established. In addition to the uniform estimates on the velocity, some essential uniform estimates…

偏微分方程分析 · 数学 2010-01-21 Xianpeng Hu , Dehua Wang

We prove that the 3D Euler and Navier-Stokes equations are strongly illposed in supercritical Sobolev spaces. In the inviscid case, for any $0 < s < \frac{5}{2} $, we construct a $C^\infty_c$ initial velocity field with arbitrarily small…

偏微分方程分析 · 数学 2024-05-28 Xiaoyutao Luo

In a recent series of papers new exact analytical solutions of Einstein equations representing interior spacetimes sourced by stationary rigidly rotating cylinders of fluids have been displayed. We have first considered a fluid with an…

广义相对论与量子宇宙学 · 物理学 2024-07-08 M. -N. Célérier

We investigate the incompressible inhomogeneous magnetohydrodynamic equations in $\mathbb{R}^3$, under the assumptions that the initial density $\rho_0$ is only bounded, and the initial velocity $u_0$ and magnetic field $B_0$ exhibit…

偏微分方程分析 · 数学 2025-01-14 Fucai Li , Jinkai Ni , Ling-Yun Shou

Here we prove the all-time propagation of the Sobolev regularity for the velocity field solution of the two-dimensional compressible Navier-Stokes equations, provided the volume (bulk) viscosity coefficient is large enough. The initial…

偏微分方程分析 · 数学 2021-03-03 Raphaël Danchin , Piotr Boguslaw Mucha

In a recent series of papers, new exact analytical solutions to field equations of General Relativity representing interior spacetimes sourced by stationary rigidly rotating cylinders of fluids with various equations of state have been…

广义相对论与量子宇宙学 · 物理学 2024-07-08 M. -N. Célérier

The nonhomogeneous Navier-Stokes equations are considered in a cylindrical domain in ${\mathbb R}^3$, parallel to the $x_3$-axis with large inflow and outflow on the top and the bottom. Moreover, on the lateral part of the cylinder the slip…

偏微分方程分析 · 数学 2024-02-08 Joanna Rencławowicz , Wojciech M. Zajączkowski

Incompressible fluid equations are studied with UV cut-off and in periodic boundary conditions. Properties of the resulting ODEs holding uniformly in the cut-off are considered and, in particular, are conjectured to be equivalent to…

统计力学 · 物理学 2024-01-02 Giovanni Gallavotti

We prove that the solutions to the 3D Navier-Stokes equation with constant rotation exist globally for small axisymmetric initial data, where the smallness is uniform with respect to the viscosity $\nu \in [0,\infty)$. This expands the work…

偏微分方程分析 · 数学 2025-09-23 Haram Ko

In this article, we study nonlinear Vlasov equations with a smooth interaction kernel on a compact manifold without boundary where the geodesic flow exhibits strong chaotic behavior, known as the Anosov property. We show that, for small…

偏微分方程分析 · 数学 2024-07-08 Yann Chaubet , Daniel Han-Kwan , Gabriel Rivière

The global existence of strong solutions to the compressible viscous magnetohydrodynamic (MHD) equations in $\mathbb{R}^3$ remains a significant open problem. When there is no magnetic diffusion, even small data global well-posedness is…

偏微分方程分析 · 数学 2025-05-08 Jiahong Wu , Xiaoping Zhai

In this paper, we investigate the Rayleigh-Taylor instability problem for two compressible, immiscible, inviscid flows rotating with an constant angular velocity, and evolving with a free interface in the presence of a uniform gravitational…

综合数学 · 数学 2012-05-01 Ran Duan , Fei Jiang , Song Jiang

The effective stress tensor of a homogeneous turbulent rotating fluid is anisotropic. This leads us to consider the most general axisymmetric four-rank ``viscosity tensor'' for a Newtonian fluid and the new terms in the turbulent effective…

混沌动力学 · 物理学 2008-11-26 J. Gaite