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We study the motion of isentropic gas in nozzles. This is a major subject in fluid dynamics. In fact, the nozzle is utilized to increase the thrust of rocket engines. Moreover, the nozzle flow is closely related to astrophysics. These…

偏微分方程分析 · 数学 2017-02-21 Naoki Tsuge

An asymptotic preserving and energy stable scheme for the barotropic Euler system under the low Mach number scaling is designed and analysed. A velocity shift proportional to the pressure gradient is introduced in the convective fluxes,…

数值分析 · 数学 2023-07-21 K. R. Arun , Rahuldev Ghorai , Mainak Kar

We consider 3D free-boundary compressible elastodynamic system under the Rayleigh-Taylor sign condition. It describes the motion of an isentropic inviscid elastic medium with moving boundary. The deformation tensor satisfies the neo-Hookean…

偏微分方程分析 · 数学 2022-07-01 Junyan Zhang

We introduce a natural notion of incompressibility for fluids governed by the relativistic Euler equations on a fixed background spacetime, and show that the resulting equations reduce to the incompressible Euler equations in the classical…

广义相对论与量子宇宙学 · 物理学 2017-06-15 Moritz Reintjes

In this paper, we consider the Cauchy problem of the multi-dimensional compressible Navier-Stokes-Euler system for two-phase flow motion, which consists of the isentropic compressible Navier-Stokes equations and the isothermal compressible…

偏微分方程分析 · 数学 2024-08-09 Hai-Liang Li , Ling-Yun Shou

It is shown that the universal steady Euler flow field, independent of boundary shape or symmetry, in a toroidal domain with fixed boundary obeys a nonlinear Beltrami equation, with the nonlinearity arising from a Boltzmann-like,…

流体动力学 · 物理学 2017-08-22 Naoki Sato , Robert L. Dewar

We consider a sequence of approximate solutions to the compressible Euler system admitting uniform energy bounds and/or satisfying the relevant field equations modulo an error vanishing in the asymptotic limit. We show that such a sequence…

偏微分方程分析 · 数学 2020-01-03 Eduard Feireisl , Martina Hofmanová

For the problem of the non-isentropic compressible Euler Equations coupled with a nonlinear Poisson equation with the electric potential satisfying the Dirichlet boundary condition in three spatial dimensions with a general free boundary…

偏微分方程分析 · 数学 2023-11-03 Tao Luo , Konstantina Trivisa , Huihui Zeng

Starting from the local-in-time classical solution to the compressible Euler system with impermeable boundary condition in half-space, by employing the coupled weak viscous layers (governed by linearized compressible Prandtl equations with…

偏微分方程分析 · 数学 2021-08-03 Ning Jiang , Yi-Long Luo , Shaojun Tang

For the physical vacuum free boundary problem with the sound speed being $C^{{1}/{2}}$-H$\ddot{\rm o}$lder continuous near vacuum boundaries of the one-dimensional compressible Euler equations with damping, the global existence of the…

偏微分方程分析 · 数学 2014-08-01 Tao Luo , Huihui Zeng

We establish the existence and compactness of global martingale entropy solutions with finite relative-energy for the stochastically forced system of isentropic Euler equations governed by a general pressure law. To achieve these, a…

偏微分方程分析 · 数学 2025-12-30 Gui-Qiang G. Chen , Feimin Huang , Danli Wang

We study the limiting behavior of the solutions of Euler equations of one-dimensional compressible fluid flow as the pressure like term vanishes. This system can be thought of as an approximation for the one dimensional model for large…

偏微分方程分析 · 数学 2018-03-06 Manas Ranjan Sahoo , Abhrojyoti Sen

We consider the local well-posedness of the one-dimensional nonisentropic Euler equations with moving physical vacuum boundary condition. The physical vacuum singularity requires the sound speed to be scaled as the square root of the…

偏微分方程分析 · 数学 2019-05-29 Yongcai Geng , Yachun Li , Dehua Wang , Runzhang Xu

We consider the free boundary problem for a layer of compressible viscous barotropic fluid lying above a fixed rigid bottom and below the atmosphere of positive constant pressure. The fluid dynamics is governed by the compressible…

偏微分方程分析 · 数学 2024-11-01 Ting Sun , Yanjin Wang

In this paper, we investigate the initial value problem for the Euler-Riesz system, where the interaction forcing is given by $\nabla(-\Delta)^{s}\rho$ for some $-1<s<0$, with $s = -1$ corresponding to the classical Euler-Poisson system. We…

偏微分方程分析 · 数学 2020-09-21 Young-Pil Choi , In-Jee Jeong

The collective behavior of animals can be modeled by a system of equations of continuum mechanics endowed with extra terms describing repulsive and attractive forces between the individuals. This system can be viewed as a generalization of…

动力系统 · 数学 2016-11-24 Jan Březina , Václav Mácha

We study a free boundary problem which is motivated by a particular case of the flow of a non-Newtonian fluid, with a pressure depending yield stress given by a Drucker-Prager plasticity criterion. We focus on the steady case and…

偏微分方程分析 · 数学 2017-01-19 Eleftherios Ntovoris , M Regis

In this paper, the smooth solution of the physical vacuum problem for the one dimensional compressible Euler equations with time-dependent damping is considered. Near the vacuum boundary, the sound speed is $C^{1/2}$-H\"{o}lder continuous.…

偏微分方程分析 · 数学 2022-08-08 Xinghong Pan

Several recent papers considered the high-friction limit for systems arising in fluid mechanics. Following this approach, we rigorously derive the nonlocal Cahn-Hilliard equation as a limit of the nonlocal Euler-Korteweg equation using the…

偏微分方程分析 · 数学 2023-08-24 Charles Elbar , Piotr Gwiazda , Jakub Skrzeczkowski , Agnieszka Świerczewska-Gwiazda

In this paper, we study a nonlocal extension of the Aw-Rascle-Zhang traffic model, where the pressure-like term is modeled as a convolution between vehicle density and a kernel function. This formulation captures nonlocal driver…

偏微分方程分析 · 数学 2026-02-10 Debora Amadori , Felisia Angela Chiarello , Gianmarco Cipollone