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We prove a priori estimates for the compressible Euler equations modeling the motion of a liquid with moving physical vacuum boundary in an unbounded initial domain. The liquid is under influence of gravity but without surface tension. Our…

Analysis of PDEs · Mathematics 2018-12-06 Chenyun Luo

Global stability of the spherically symmetric nonisentropic compressible Euler equations with positive density around global-in-time background affine solutions is shown in the presence of free vacuum boundaries. Vacuum is achieved despite…

Analysis of PDEs · Mathematics 2021-06-03 Calum Rickard

We study the relativistic Euler equations on the Minkowski spacetime background. We make assumptions on the equation of state and the initial data that are relativistic analogs of the well-known physical vacuum boundary condition, which has…

Analysis of PDEs · Mathematics 2015-11-25 Mahir Hadzic , Steve Shkoller , Jared Speck

In this paper, we consider a free boundary problem of the incompressible elatodynamics, a coupling system of the Euler equations for the fluid motion with a transport equation for the deformation tensor. Under a natural force balance law on…

Analysis of PDEs · Mathematics 2021-12-16 Xumin Gu , Zhen Lei

The global well-posedness and stability of solutions to the three-dimensional compressible Euler equations with damping is a longstanding open problem. This problem was addressed in \cite{WY, STW} in the isentropic regime (i.e. $\gamma>1$)…

Analysis of PDEs · Mathematics 2025-02-19 Feimin Huang , Houzhi Tang , Shuxing Zhang , Weiyuan Zou

In this paper we prove the local well-posedness (LWP) for the 3D compressible Euler equations describing the motion of a liquid in an unbounded initial domain with moving boundary. The liquid is under the influence of gravity but without…

Analysis of PDEs · Mathematics 2022-06-15 Chenyun Luo , Junyan Zhang

In this paper, the Cauchy problem for the three-dimensional (3-D) isentropic compressible Navier-Stokes equations with degenerate viscosities is considered. By introducing some new variables and making use of the "quasi-symmetric…

Analysis of PDEs · Mathematics 2019-04-09 Zhouping Xin , Shengguo Zhu

For the physical vacuum free boundary problem of the damped compressible Euler equations in both 2D and 3D, we prove the global existence of smooth solutions and justify their time-asymptotic equivalence to the corresponding Barenblatt…

Analysis of PDEs · Mathematics 2025-11-06 Huihui Zeng

For the three-dimensional vacuum free boundary problem with physical singularity that the sound speed is $C^{ {1}/{2}}$-H$\ddot{\rm o}$lder continuous across the vacuum boundary of the compressible Euler equations with damping, without any…

Analysis of PDEs · Mathematics 2020-10-28 Huihui Zeng

This paper investigates the local existence and uniqueness of strong solutions to the three-dimensional compressible Navier-Stokes equations with density-dependent viscosities in exterior domains. When both the shear and bulk viscosity…

Analysis of PDEs · Mathematics 2025-12-09 Hairong Liu , Hua Zhong

This paper is concerned with the 1-D compressible Euler-Poisson equations with moving physical vacuum boundary condition. It is usually used to describe the motion of a self-gravitating inviscid gaseous star. The local well-posedness of…

Analysis of PDEs · Mathematics 2011-05-04 Xumin Gu , Zhen Lei

For the degenerate viscous and heat conductive compressible fluids, the momentum equations and the energy equation are degenerate both in the time evolution and spatial dissipation when vacuum appears, and then the physical entropy S…

Analysis of PDEs · Mathematics 2024-04-30 Qin Duan , Zhouping Xin , Shengguo Zhu

In this article, we provide a definitive well-posedness theory for the free boundary problem in incompressible magnetohyrodynamics. Despite the clear physical interest in this system and the remarkable progress in the study of the free…

Analysis of PDEs · Mathematics 2024-12-23 Mihaela Ifrim , Ben Pineau , Daniel Tataru , Mitchell A. Taylor

This paper focuses on the structure of classical sonic-supersonic solutions near sonic curves for the two-dimensional full Euler equations in gas dynamics. In order to deal with the parabolic degeneracy near the sonic curve, a novel set of…

Analysis of PDEs · Mathematics 2019-10-23 Yanbo Hu , Jiequan Li

In this paper we prove full local well-posedness for the Cauchy problem for the compressible 3D Euler equation, i.e. local existence, uniqueness, and continuous dependence on initial data, with initial velocity, density and vorticity…

Analysis of PDEs · Mathematics 2026-02-05 Lars Andersson , Huali Zhang

We consider a rigid body freely moving in a compressible inviscid fluid within a bounded domain $\Omega\subset\mathbb{R}^3$. The fluid is thereby governed by the non necessarily isentropic compressible Euler equations, while the rigid body…

Analysis of PDEs · Mathematics 2025-12-11 Frédéric Rousset , Pei Su

In this paper, the global existence of smooth solution and the long-time asymptotic stability of the equilibrium to vacuum free boundary problem of the spherically symmetric Euler equations with damping and solid core have been obtained for…

Analysis of PDEs · Mathematics 2024-02-22 Yan-Lin Wang

We establish global existence of solutions to the compressible Euler equations, in the case that a finite volume of ideal gas expands into vacuum. Vacuum states can occur with either smooth or singular sound speed, the latter corresponding…

Analysis of PDEs · Mathematics 2019-04-03 Steve Shkoller , Thomas C. Sideris

We derive a new formulation of the $3D$ compressible Euler equations with dynamic entropy exhibiting remarkable null structures and regularity properties. Our results hold for an arbitrary equation of state (which yields the pressure in…

Analysis of PDEs · Mathematics 2017-01-25 Jared Speck

This paper is concerned with the three dimensional compressible Euler--Poisson equations with moving physical vacuum boundary condition. This fluid system is usually used to describe the motion of a self-gravitating inviscid gaseous star.…

Analysis of PDEs · Mathematics 2014-05-20 Xumin Gu , Zhen Lei