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We consider weak solutions to the incompressible Euler equations. It is shown that energy conservation holds in any Onsager critical class in which smooth functions are dense. The argument is independent of the specific critical regularity…

偏微分方程分析 · 数学 2026-01-08 Luigi De Rosa , Marco Inversi , Matteo Nesi

Whether the 3D incompressible Euler equations can develop a singularity in finite time from smooth initial data is one of the most challenging problems in mathematical fluid dynamics. This work attempts to provide an affirmative answer to…

流体动力学 · 物理学 2015-06-17 Guo Luo , Thomas Y. Hou

For the compressible Euler equations, even when the initial data are uniformly away from vacuum, solution can approach vacuum in infinite time. Achieving sharp lower bounds of density is crucial in the study of Euler equations. In this…

偏微分方程分析 · 数学 2015-09-17 Geng Chen

We study the future stability of cosmological fluids, in spacetimes with an accelerated expansion, which exhibit extreme tilt behavior, ie. their fluid velocity becoming asymptotically null at timelike infinity. It has been predicted in the…

偏微分方程分析 · 数学 2024-04-11 Grigorios Fournodavlos , Elliot Marshall , Todd A. Oliynyk

In this paper, we investigate the global well-posedness and optimal time-decay of classical solutions for the 3-D full compressible Navier-Stokes system, which is given by the motion of the compressible viscous and heat-conductive gases.…

偏微分方程分析 · 数学 2025-03-20 Wenwen Huo , Chao Zhang

In this paper the author considers the motion of a relativistic perfect fluid with self-interaction mediated by Nordstrom's scalar theory of gravity. The evolution of the fluid is determined by a quasilinear hyperbolic system of PDEs, and a…

数学物理 · 物理学 2008-10-12 Jared Speck

In this paper, we investigate the uniform regularity for the isentropic compressible Navier-Stokes system with general Navier-slip boundary conditions (1.6) and the inviscid limit to the compressible Euler system. It is shown that there…

偏微分方程分析 · 数学 2015-01-09 Wang Yong , Xin Zhouping , Yong Yan

For the initial boundary problem of the incompressible MHD equations in a bounded domain with general curved boundary in 3D with the general Navier-slip boundary conditions for the velocity field and the perfect conducting condition for the…

偏微分方程分析 · 数学 2024-04-18 Yingzhi Du , Tao Luo

We consider the three-dimensional incompressible Euler equation \begin{equation*}\left\{\begin{aligned} &\partial_t \Omega+U \cdot \nabla \Omega+\Omega\cdot \nabla U=0 \\ &\Omega(x,0)=\Omega_0(x) \end{aligned}\right. \end{equation*} in the…

偏微分方程分析 · 数学 2024-03-15 Dengjun Guo , Lifeng Zhao

We derive a priori estimates for the compressible free-boundary Euler equations with surface tension in three spatial dimensions in the case of a liquid. These are estimates for local existence in Lagrangian coordinates when the initial…

偏微分方程分析 · 数学 2019-10-01 Marcelo M. Disconzi , Igor Kukavica

We derive a priori estimates for the compressible free boundary Euler equations in the case of a liquid without surface tension. We provide a new weighted functional framework which leads to the improved regularity of the flow map by using…

偏微分方程分析 · 数学 2023-12-29 Linfeng Li

The present paper aims to establish the local well-posedness of Euler's fluid equations on geometric rough paths. In particular, we consider the Euler equations for the incompressible flow of an ideal fluid whose Lagrangian transport…

偏微分方程分析 · 数学 2022-07-01 Dan Crisan , Darryl D. Holm , James-Michael Leahy , Torstein Nilssen

We construct global-in-time weak solutions to the pressureless Euler alignment system posed on the whole line and supplemented with initial conditions, where an initial density is an arbitrary, nonnegative, bounded, and integrable function…

偏微分方程分析 · 数学 2024-09-24 Szymon Cygan , Grzegorz Karch

In this paper we establish the local-in-time existence and uniqueness of strong solutions to the free boundary problem of the full compressible Navier-Stokes equations in three-dimensional space. The vanishing density and temperature…

偏微分方程分析 · 数学 2018-04-11 Xin Liu , Yuan Yuan

We consider the free boundary problem for the irrotational compressible Euler equation in a physical vacuum setting. By using the irrotationality condition in the Eulerian formulation of Ifrim and Tataru, we derive a formulation of the…

偏微分方程分析 · 数学 2025-04-28 Ovidiu-Neculai Avadanei

In this paper, we prove the local well-posedness of the free boundary problem for the incompressible Euler equations in low regularity Sobolev spaces, in which the velocity is a Lipschtiz function and the free surface belongs to…

偏微分方程分析 · 数学 2015-07-10 Chao Wang , Zhifei Zhang , Weiren Zhao , Yunrui Zheng

In the recent paper, the global-in-time inviscid limit of the three-dimensional (3D) isentropic compressible Navier-Stokes equations is considered. First, when viscosity coefficients are given as a constant multiple of density's power…

偏微分方程分析 · 数学 2019-11-21 Yongcai Geng , Yachun Li , Shengguo Zhu

We consider the Cauchy problem to the 3D barotropic compressible Navier-Stokes equation. We prove global well-posedness, assuming that the initial data $(\rho_0-1,u_0)$ has small norms in the critical Besov space…

偏微分方程分析 · 数学 2025-09-23 Zihua Guo , Zihao Song , Minghua Yang

We consider the barotropic Euler equations in dimension d>1 with decaying density at spatial infinity. The phase portrait of the nonlinear ode governing the equation for spherically symmetric self-similar solutions has been introduced in…

偏微分方程分析 · 数学 2019-12-24 Frank Merle , Pierre Raphael , Igor Rodnianski , Jeremie Szeftel

We study one-dimensional motions of polytropic gas governed by the compressible Euler equations. The problem on the half space under a constant gravity gives an equilibrium which has free boundary touching the vacuum and the linearized…

偏微分方程分析 · 数学 2013-05-29 Cheng-Hsiung Hsu , Song-Sun Lin , Tetu Makino , Chi-Ru Yang