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This work intends to prove that strong instabilities may appear for high order geometric optics expansions of weakly stable quasilinear hyperbolic boundary value problems, when the forcing boundary term is perturbed by a small amplitude…

偏微分方程分析 · 数学 2022-06-30 Corentin Kilque

This paper establishes the nonlinear time-asymptotic stability of shifted planar viscous shock waves for the three-dimensional relaxed compressible Navier-Stokes equations, in which a modified Maxwell-type model replaces the classical…

偏微分方程分析 · 数学 2025-11-12 Renyong Guan , Yuxi Hu

We study the stability properties of hydrodynamic shocks with finite Mach numbers. The linear analysis supplements previous analyses which took the strong shock limit. We derive the linearised equations for a general specific heat ratio as…

天体物理学 · 物理学 2009-11-13 Babulakshmanan Ramachandran , Michael D. Smith

Despite the physical importance, there are limited mathematical theories for the compressible Navier-Stokes equations with strong boundary layers. This is mainly due to the absence of a stream function structure, unlike the extensively…

偏微分方程分析 · 数学 2025-02-12 Shengxin Li , Tong Yang , Zhu Zhang

We consider shear wave propagation in soft viscoelastic solids of rate type. Based on objective stress rates, the constitutive model accounts for finite strain, incompressibility, as well as stress- and strain-rate viscoelasticity. The…

软凝聚态物质 · 物理学 2023-09-25 Harold Berjamin , Michel Destrade , Giuseppe Saccomandi

The evolutionary conditions for the dissipative continuous magnetohydrodynamic (MHD) shocks are studied. We modify Hada's approach in the stability analysis of the MHD shock waves. The matching conditions between perturbed shock structure…

天体物理学 · 物理学 2008-11-26 Tsuyoshi Inoue , Shu-ichiro Inutsuka

In this paper, we are concerned with the long time behavior of the piecewise smooth solutions to the generalized Riemann problem governed by the compressible isothermal Euler equations in two and three dimensions. Non-existence result is…

偏微分方程分析 · 数学 2018-07-23 Ning-An Lai , Wei Xiang , Yi Zhou

Here, we provide a theoretical framework revealing that a steady compression ramp flow must have the minimal dissipation of kinetic energy, and can be demonstrated using the least action principle. For a given inflow Mach number $M_{0}$ and…

流体动力学 · 物理学 2020-05-19 Yan-Chao Hu , Wen-Feng Zhou , Yan-Guang Yang , Zhi-Gong Tang , Zhao-Hu Qin

We investigate existence and stability of viscoelastic shock profiles for a class of planar models including the incompressible shear case studied by Antman and Malek-Madani. We establish that the resulting equations fall into the class of…

偏微分方程分析 · 数学 2015-05-19 Blake Barker , Marta Lewicka , Kevin Zumbrun

The combination of fast propagation speeds and highly localized nature has hindered the direct observation of the evolution of shock waves at the molecular scale. To address this limitation, an experimental system is designed by tuning a…

软凝聚态物质 · 物理学 2021-07-07 Jian Li , Chockalingam Senthilnathan , Tal Cohen

The temporal evolution of weak shocks in radiative media is theoretically investigated in this work. The structure of radiative shocks has traditionally been studied in a stationary framework. Their systematic classification is complex…

等离子体物理 · 物理学 2024-05-31 F. Garcia-Rubio , V. Tranchant , E. C. Hansen , R. Tabassum , A. Reyes , H. U. Rahman , P. Ney , E. Ruskov , P. Tzeferacos

In this paper we study existence and stability of shock profiles for a 1-D compressible Euler system in the context of Quantum Hydrodynamic models. The dispersive term is originated by the quantum effects described through the Bohm…

偏微分方程分析 · 数学 2019-04-24 Corrado Lattanzio , Pierangelo Marcati , Delyan Zhelyazov

Compressible vortex sheets are fundamental waves in entropy solutions to the multidimensional hyperbolic systems of conservation laws. For the Euler equations in 2-D gas dynamics, the classical linearized stability analysis on compressible…

偏微分方程分析 · 数学 2007-05-23 Gui-Qiang Chen , Ya-Guang Wang

By a combination of asymptotic ODE estimates and numerical Evans function calculations, we establish stability of viscous shock solutions of the isentropic compressible Navier--Stokes equations with $\gamma$-law pressure (i) in the limit as…

偏微分方程分析 · 数学 2017-06-09 Jeffrey Humpherys , Olivier Laffite , Kevin Zumbrun

We prove a stable shock formation result for a large class of systems of quasilinear wave equations in two spatial dimensions. We give a precise description of the dynamics all the way up to the singularity. Our main theorem applies to…

偏微分方程分析 · 数学 2018-04-19 Jared Speck

Extending results of Humpherys-Lyng-Zumbrun in the one-dimensional case, we use a combination of asymptotic ODE estimates and numerical Evans-function computations to examine the multidimensional stability of planar Navier--Stokes shocks…

偏微分方程分析 · 数学 2017-08-02 Jeffrey Humpherys , Gregory Lyng , Kevin Zumbrun

We determine the growth rate of linear instabilities resulting from long-wavelength transverse perturbations applied to periodic nonlinear wave solutions to the Schamel-Korteweg-de Vries-Zakharov-Kuznetsov (SKdVZK) equation which governs…

等离子体物理 · 物理学 2022-12-26 S. Phibanchon , M. A. Allen , G. Rowlands

Statistical solutions of incompressible Euler describe turbulent dynamics as time-parameterized laws on $L^2$ whose multi-point correlations satisfy an infinite hierarchy of weak identities. Modern generative samplers for PDE forecasting…

偏微分方程分析 · 数学 2026-02-24 Victor Armegioiu

A fundamental problem of forced magnetic reconnection has been solved taking into account the plasmoid instability of thin reconnecting current sheets. In this problem, the reconnection is driven by a small amplitude boundary perturbation…

等离子体物理 · 物理学 2015-04-22 Luca Comisso , Daniela Grasso , François L. Waelbroeck

Extending our previous work in the strictly parabolic case, we show that a linearly unstable Lax-type viscous shock solution of a general quasilinear hyperbolic--parabolic system of conservation laws possesses a translation-invariant center…

偏微分方程分析 · 数学 2015-05-13 Kevin Zumbrun