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In this paper, we study non-Newtonian fluids in a class of unbounded domains with noncompact boundaries. With respect to the resulting mathematical problems, we establish the global existence of solutions with arbitrary large flux under…

偏微分方程分析 · 数学 2016-11-24 Jiaqi Yang , Huicheng Yin

In this paper we establish the incompressible limit for the compressible free-boundary Euler equations with surface tension in the case of a liquid. Compared to the case without surface tension treated recently, the presence of surface…

偏微分方程分析 · 数学 2020-05-14 Marcelo M. Disconzi , Chenyun Luo

A basic example of shear flow was introduced by DiPerna and Majda to study the weak limit of oscillatory solutions of the Euler equations of incompressible ideal fluids. In particular, they proved by means of this example that weak limit of…

偏微分方程分析 · 数学 2009-10-13 Claude Bardos , Edriss S. Titi

In this paper we prove that the Euler equation describing the motion of an ideal fluid in $\R^d$ is well-posed in a class of functions allowing spatial asymptotic expansions as $|x|\to\infty$ of any a priori given order. These asymptotic…

偏微分方程分析 · 数学 2016-09-27 R. McOwen , Peter Topalov

We investigate theoretically the near-wall region in elastic turbulence of a dilute polymer solution in the limit of large Weissenberg number. As it was established experimentally, elastic turbulence possesses a boundary layer where the…

流体动力学 · 物理学 2019-02-20 S. Belan , A. Chernykh , V. Lebedev

We consider the Euler system set on a bounded convex planar domain, endowed with impermeability boundary conditions. This system is a model for the barotropic mode of the Primitive Equations on a rectangular domain. We show the existence of…

偏微分方程分析 · 数学 2013-08-19 Claude Bardos , Francesco Di Plinio , Roger Temam

We investigate some qualitative aspects of the dynamics of the Euler equation on a rotating sphere that are relevant or stratospheric flows. Zonal flow dominates the dynamics of the stratosphere and for most known planetary stratospheres…

偏微分方程分析 · 数学 2025-03-19 Adrian Constantin , Pierre Germain , Zhiwu Lin , Hao Zhu

We prove that the curvature flow of an embedded planar network of three curves connected through a triple junction, with fixed endpoints on the boundary of a given strictly convex domain, exists smooth until the lengths of the three curves…

偏微分方程分析 · 数学 2014-02-06 Annibale Magni , Carlo Mantegazza , Matteo Novaga

The 3D incompressible Euler equations in a bounded domain are most often supplemented with impermeable boundary conditions, which constrain the fluid to neither enter nor leave the domain. We establish well-posedness with inflow, outflow of…

偏微分方程分析 · 数学 2024-12-19 Gung-Min Gie , James P. Kelliher , Anna L. Mazzucato

We prove the existence of the flow by curvature of regular planar networks starting from an initial network which is non-regular. The proof relies on a monotonicity formula for expanding solutions and a local regularity result for the…

偏微分方程分析 · 数学 2018-02-21 Tom Ilmanen , André Neves , Felix Schulze

We study the dynamical behavior of compressible fluids evolving on the outer domain of communication of a Schwarzschild background. To this end, we design several numerical methods which take the Schwarzschild geometry into account and we…

偏微分方程分析 · 数学 2016-12-30 Philippe G. LeFloch , Shuyang Xiang

In this paper, we prove the linear damping for the 2-D Euler equations around a class of shear flows under the assumption that the linearized operator has no embedding eigenvalues. For the symmetric flows, we obtain the explicit decay…

偏微分方程分析 · 数学 2017-04-04 Dongyi Wei , Zhifei Zhang , Weiren Zhao

We characterize, using commuting zero-flux homologies, those volume-preserving vector fields on a $3$-manifold that are steady solutions of the Euler equations for some Riemannian metric. This result extends Sullivan's homological…

微分几何 · 数学 2020-02-11 Daniel Peralta-Salas , Ana Rechtman , Francisco Torres de Lizaur

We consider the scattering of acoustic waves emitted by an active source above a plane turbulent shear layer. The layer is modeled by a moving random medium with small spatial and temporal fluctuations of its mean velocity, and constant…

流体动力学 · 物理学 2020-05-19 Josselin Garnier , Etienne Gay , Éric Savin

We prove a continuation critereon for incompressible liquids with free surface boundary. We combine the energy estimates of Christodoulou and Lindblad with an analog of the estimate due to Beale, Kato, and Majda for the gradient of the…

偏微分方程分析 · 数学 2019-06-04 Daniel Ginsberg

Motivated by recent studies in geophysical and planetary sciences, we investigate the PDE-analytical aspects of time-averages for barotropic, inviscid flows on a fast rotating sphere $S^2$. Of particular interests are the incompressible…

偏微分方程分析 · 数学 2011-08-15 Bin Cheng , Alex Mahalov

In this paper, we study the mean curvature flow of graphs with Neumann boundary condition. The main aim is to use the maximum principle to get the boundary gradient estimate for solutions. In particular, we obtain the corresponding…

偏微分方程分析 · 数学 2016-06-22 Jinju Xu

This paper continues the systematic investigation of diffusive shear instabilities initiated in Part I of this series. In this work, we primarily focus on quantifying the impact of non-local mixing, which is not taken into account in Zahn's…

太阳与恒星天体物理 · 物理学 2018-07-25 D. Gagnier , P. Garaud

It was recently shown that the nodal deficiency of an eigenfunction is encoded in the spectrum of the Dirichlet-to-Neumann operators for the eigenfunction's positive and negative nodal domains. While originally derived using symplectic…

偏微分方程分析 · 数学 2024-02-15 Gregory Berkolaiko , Graham Cox , Jeremy L. Marzuola

We study the area preserving curve shortening flow with Neumann free boundary conditions outside of a convex domain in the Euclidean plane. Under certain conditions on the initial curve the flow does not develop any singularity, and it…

偏微分方程分析 · 数学 2015-03-20 Elena Mäder-Baumdicker