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In this note we continue our study of unidirectional solutions to hydrodynamic Euler alignment systems with strongly singular communication kernels $\phi(x):=|x|^{-(n+\alpha)}$ for $\alpha\in(0,2)$. Here, we consider the critical case…

偏微分方程分析 · 数学 2021-05-26 Daniel Lear

This paper studies the global existence and uniqueness of strong solutions and its large-time behavior for the compressible isothermal Euler equations with a nonlocal dissipation. The system is rigorously derived from the kinetic…

偏微分方程分析 · 数学 2018-01-16 Young-Pil Choi

For the 3-D quadratic quasilinear wave equations in exterior domains with Dirichlet or Neumann boundary conditions, the global existence or the maximal existence time of small data smooth solutions have been established in the past.…

偏微分方程分析 · 数学 2026-02-17 Fei Hou , Huicheng Yin , Meng Yuan

We consider the Cauchy problem for the isentropic compressible Euler-Maxwell equations under general pressure laws in a three-dimensional periodic domain. For any smooth initial electron density away from the vacuum and smooth…

偏微分方程分析 · 数学 2023-05-23 Shunkai Mao , Peng Qu

In this paper, we prove the existence and uniqueness of subsonic solutions to the steady Euler flows past a smooth, axisymmetric obstacle. Specifically, for a broad class of prescribed positive axial velocities in the upstream, the subsonic…

偏微分方程分析 · 数学 2026-02-27 Dehua Wang , Tian-Yi Wang , Weiqiang Wang

We study the Cauchy problem associated with the system of two conservation laws arising in isothermal gas dynamics, in which the pressure and the density are related by the $\gamma$-law equation $p(\rho) \sim \rho^\gamma$ with $\gamma =1$.…

偏微分方程分析 · 数学 2009-11-13 Philippe G. LeFloch , Vladimir Shelukhin

We investigate the Cauchy problem for a 2x2-system of weakly coupled semi-linear fractional wave equations with polynomial nonlinearities posed in R+ x RN. Under appropriate conditions on the exponents and the fractional orders of the time…

偏微分方程分析 · 数学 2020-10-08 Ahmad Bashir , Mohamed Berbiche , Ahmed Elsaedi , Mokhtar Kirane

We investigate the existence of solutions of reversible and irreversible port-Hamiltonian systems. To this end, we utilize the associated exergy, a function that is composed of the system's Hamiltonian and entropy, to prove global existence…

最优化与控制 · 数学 2024-10-25 Willem Esterhuizen , Bernhard Maschke , Till Preuster , Manuel Schaller , Karl Worthmann

This paper proposes a new general methodology for finite-time singularity formation for moving interface problems involving the incompressible Euler equations in the plane. The first problem considered is the two-phase Euler vortex sheets…

偏微分方程分析 · 数学 2017-09-04 Daniel Coutand

This paper provides results on local and global existence for a class of solutions to the Euler equations for an incompressible, inviscid fluid. By considering a class of solutions which exhibits a characteristic growth at infinity we…

偏微分方程分析 · 数学 2009-02-27 Ralph Saxton , Feride Tiglay

We prove existence of rotating star solutions which are steady-state solutions of the compressible isentropic Euler-Poisson (EP) equations in 3 spatial dimensions, with prescribed angular momentum and total mass. This problem can be…

广义相对论与量子宇宙学 · 物理学 2009-11-13 Tao Luo , Joel Smoller

We prove existence of the largest entropy sub-solution and the smallest entropy super-solution to the Cauchy problem for a nonlinear degenerate parabolic equation with only continuous flux and diffusion functions. Applying this result, we…

偏微分方程分析 · 数学 2020-12-02 Evgeny Yu. Panov

We present a rigorous approach and related techniques to construct global solutions of the 2-D Riemann problem with four-shock interactions for the Euler equations for potential flow. With the introduction of three critical angles: the…

偏微分方程分析 · 数学 2023-05-25 Gui-Qiang G. Chen , Alexander Cliffe , Feimin Huang , Song Liu , Qin Wang

The \emph{two-dimensional} (2D) existence result of global(-in-time) solutions for the motion equations of incompressible, inviscid, non-resistive magnetohydrodynamic (MHD) fluids with velocity damping had been established in [Wu--Wu--Xu,…

偏微分方程分析 · 数学 2021-05-14 Fei Jiang , Song Jiang , Youyi Zhao

We study rigorously the infinite Reynolds limit of the solutions of the Landau-Lifschitz equations of fluctuating hydrodynamics for an incompressible fluid on a $d$-dimensional torus for $d\geq 2.$ These equations, which model the effects…

数学物理 · 物理学 2024-09-23 Gregory L. Eyink , Lowen Peng

In this paper, we establish the existence and uniqueness of subsonic flows with a contact discontinuity in a two-dimensional finitely long slightly curved nozzle by prescribing the entropy, the Bernoulli's quantity and the horizontal mass…

偏微分方程分析 · 数学 2024-04-08 Shangkun Weng , Zihao Zhang

We are concerned with the isothermal limit of entropy solutions in $L^\infty$, containing the vacuum states, of the Euler equations for isentropic gas dynamics. We prove that the entropy solutions in $L^\infty$ of the isentropic Euler…

偏微分方程分析 · 数学 2023-02-07 Gui-Qiang G. Chen , Fei-Min Huang , Tian-Yi Wang

In this article, we consider a class of the contact discontinuity for the full compressible Euler equations, namely the entropy wave, where the velocity is continuous across the interface while the density and the entropy can have jumps.…

偏微分方程分析 · 数学 2023-11-22 Wei Wang , Zhifei Zhang , Wenbin Zhao

In this paper, we study the existence and uniqueness of three dimensional steady Euler flows in rectangular nozzles when prescribing normal component of momentum at both the entrance and exit. If, in addition, the normal component of the…

偏微分方程分析 · 数学 2013-05-13 Chao Chen , Chunjing Xie

We are concerned with the well-posedness of the Cauchy problem for the first-order quasilinear equations with non-Lipschitz source terms and the global structures of the multi-dimensional Riemann solutions. For such quasilinear equations…

偏微分方程分析 · 数学 2025-09-09 Gaowei Cao , Gui-Qiang G. Chen , Wei Xiang , Xiaozhou Yang