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We construct the solution of the Riemann problem for the shallow water equations with discontinuous topography. The system under consideration is non-strictly hyperbolic and does not admit a fully conservative form, and we establish the…

偏微分方程分析 · 数学 2008-12-24 Philippe G. LeFloch , Mai-Duc Thanh

In this paper, we consider the Cauchy problem of the isentropic compressible Navier-Stokes equations with degenerate viscosity and vacuum in $\mathbb{R}$, where the viscosity depends on the density in a super-linear power law(i.e.,…

偏微分方程分析 · 数学 2024-03-19 Yue Cao , Yachun Li , Shaojun Yu

We consider solutions of the 2-d compressible Euler equations that are steady and self-similar. They arise naturally at interaction points in genuinely multi-dimensional flow. We characterize the possible solutions in the class of flows…

偏微分方程分析 · 数学 2012-11-14 Volker Elling , Joseph Roberts

We study an asymptotic analysis of a coupled system of kinetic and fluid equations. More precisely, we deal with the nonlinear Vlasov-Fokker-Planck equation coupled with the compressible isentropic Navier-Stokes system through a drag force…

偏微分方程分析 · 数学 2020-06-18 Young-Pil Choi , Jinwook Jung

We consider the sloshing problem for an incompressible, inviscid, irrotational fluid in an open container, including effects due to surface tension on the free surface. We restrict ourselves to a constant contact angle and seek…

偏微分方程分析 · 数学 2017-06-21 Chee Han Tan , Christel Hohenegger , Braxton Osting

We prove the existence of weak solutions to the steady compressible Navier-Stokes system in the barotropic case for a class of pressure laws singular at vacuum. We consider the problem in a bounded domain in R^2 with slip boundary…

偏微分方程分析 · 数学 2015-06-16 Michał Łasica

We consider an initial value problem for a Hamilton--Jacobi equation with a quadratic and degenerate Hamiltonian. Our Hamiltonian comes from the dynamics of $N$-peakon in the Camassa--Holm equation. It is given by a quadratic form with a…

偏微分方程分析 · 数学 2020-07-06 Tomasz Cieślak , Jakub Siemianowski , Andrzej Święch

In this paper, the Riemann problem for the pressureless Euler equations with a discontinuous source term is considered. The delta shock wave solution is obtained by combining the generalized Rankine-Hugoniot conditions together with the…

偏微分方程分析 · 数学 2017-12-13 Qingling Zhang

Effective theory arguments are used to derive the most general energy-momentum tensor of a relativistic viscous fluid with an arbitrary equation of state (in the absence of other conserved currents) that is first-order in the derivatives of…

广义相对论与量子宇宙学 · 物理学 2022-02-22 Fábio S. Bemfica , Marcelo M. Disconzi , Jorge Noronha

The generalized method of characteristics is used to obtain rank-2 solutions of the classical equations of hydrodynamics in (3+1) dimensions describing the motion of a fluid medium in the presence of gravitational and Coriolis forces. We…

数学物理 · 物理学 2017-03-17 A. M. Grundland , V. Lamothe

In this work the existence of weak solutions for a class of non-Newtonian viscous fluid problems is analyzed. The problem is modeled by the steady case of the generalized Navier-Stokes equations, where the exponent $q$ that characterizes…

偏微分方程分析 · 数学 2012-04-02 Hermenegildo Borges de Oliveira

We develop a theory based on relative entropy to show the uniqueness and L^2 stability (up to a translation) of extremal entropic Rankine-Hugoniot discontinuities for systems of conservation laws (typically 1-shocks, n-shocks, 1-contact…

偏微分方程分析 · 数学 2015-05-19 Nicholas Leger , Alexis Vasseur

In this paper, we first establish regularity of the heat flow of biharmonic maps into the unit sphere $S^L\subset\mathbb R^{L+1}$ under a smallness condition of renormalized total energy. For the class of such solutions to the heat flow of…

偏微分方程分析 · 数学 2025-06-30 Jay Hineman , Tao Huang , Changyou Wang

The 2D Euler system, which governs inviscid incompressible fluid flow, can admit infinitely many steady solutions in a given domain with slip boundary conditions. To select physical classical solutions, we investigate the vanishing…

偏微分方程分析 · 数学 2026-05-21 Changfeng Gui , Chunjing Xie , Huan Xu

In the dynamics of viscous fluid, the case of vanishing kinematic viscosity is actually equivalent to the Reynolds number tending to infinity. Hence, in the limit of vanishing viscosity the fluid flow is essentially turbulent. On the other…

流体动力学 · 物理学 2018-10-08 Denis S. Goldobin

We review the first and second boundary value problems for the Stokes system posed in a bounded Lipschitz domain in $\mathbb{R}^n.$ Particular attention is given to the mixed boundary condition: a Dirichlet condition is imposed for the…

偏微分方程分析 · 数学 2018-03-06 John Fabricius

The work investigates a model that combines a convection-diffusion-reaction equation for solute concentration with an unsteady Darcy-Brinkman equation for the flow field, including the Kortweg stress. Additionally, the flow field…

偏微分方程分析 · 数学 2024-06-11 Sahil Kundu , Surya Narayan Maharana , Manoranjan Mishra

Extending investigations of M\'etivier&Zumbrun in the hyperbolic case, we treat stability of viscous shock and boundary layers for viscous perturbations of multidimensional hyperbolic systems with characteristics of variable multiplicity,…

偏微分方程分析 · 数学 2007-05-23 Olivier Gues , Guy Métivier , Mark Williams , Kevin Zumbrun

We consider a model of steady, incompressible non-Newtonian flow with neglected convective term under external forcing. Our structural assumptions allow for certain non-degenerate power-law or Carreau-type fluids. We provide the full-range…

偏微分方程分析 · 数学 2018-03-06 Miroslav Bulíček , Jan Burczak , Sebastian Schwarzacher

We consider a real two-fluid system of compressible viscous fluids with a common velocity field and algebraic closure for the pressure law. The constitutive relation involves densities of both fluids through an implicit function. The…

偏微分方程分析 · 数学 2026-02-24 Yang Li , Mária Lukáčová-Medvid'ová , Milan Pokorný , Ewelina Zatorska