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The theory of Wasserstein gradient flows in the space of probability measures has made an enormous progress over the last twenty years. It constitutes a unified and powerful framework in the study of dissipative partial differential…

偏微分方程分析 · 数学 2022-01-17 Daniel Adams , Manh Hong Duong , Goncalo dos Reis

Let $\Sigma$ be a compact manifold without boundary whose first homology is nontrivial. Hodge decomposition of the incompressible Euler's equation in terms of 1-forms yields a coupled PDE-ODE system. The $L^2$-orthogonal components are a…

数学物理 · 物理学 2023-09-25 Clodoaldo Grotta-Ragazzo , Björn Gustafsson , Jair Koiller

Nonequilibrium statistical models of point vortex systems are constructed using an optimal closure method, and these models are employed to approximate the relaxation toward equilibrium of systems governed by the two-dimensional Euler…

流体动力学 · 物理学 2018-12-26 Jonathan Maack , Bruce Turkington

The Ericksen-Leslie system is a fundamental hydrodynamic model that describes the evolution of incompressible liquid crystal flows of nematic type. In this paper, we prove the uniqueness of global weak solutions to the general…

偏微分方程分析 · 数学 2023-08-02 Francesco De Anna , Hao Wu

The global asymptotic dynamics of point vortices for the lake equations is rigorously derived. Vorticity that is initially sharply concentrated around $N$ distinct vortex centers is proven to remain concentrated for all times. Specifically,…

偏微分方程分析 · 数学 2022-08-01 Lars Eric Hientzsch , Christophe Lacave , Evelyne Miot

Three-point vertex diagram plays a key role in the whole renormalization program of several QFT (quantum field theory) models such as QED, QCD, the Standard Model of eletroweak interactions and so forth. The exact analytic result for the…

高能物理 - 唯象学 · 物理学 2008-08-12 A. T. Suzuki , J. D. Bolzan , A. G. M. Schmidt

We consider time dependent thermal fluid structure interaction. The respective models are the compressible Navier-Stokes equations and the nonlinear heat equation. A partitioned coupling approach via a Dirichlet-Neumann method and a fixed…

数值分析 · 数学 2023-07-19 Philipp Birken , Tobias Gleim , Detlef Kuhl , Andreas Meister

The venerable 2D point-vortex model plays an important role as a simplified version of many disparate physical systems, including superfluids, Bose-Einstein condensates, certain plasma configurations, and inviscid turbulence. This system is…

混沌动力学 · 物理学 2013-05-29 Spencer A. Smith , Bruce M. Boghosian

We study an ad hoc extension of the Lattice-Boltzmann method that allows the simulation of non-Newtonian fluids described by generalized Newtonian models. We extensively test the accuracy of the method for the case of shear-thinning and…

软凝聚态物质 · 物理学 2015-06-25 Susana Gabbanelli , German Drazer , Joel Koplik

In this paper we present a novel, closed three-dimensional (3D) random vortex dynamics system, which is equivalent to the Navier--Stokes equations for incompressible viscous fluid flows. The new random vortex dynamics system consists of a…

数学物理 · 物理学 2022-09-08 Zhongmin Qian , Endre Süli , Yihuang Zhang

Fluid discontinuities, such as shock fronts and vortex sheets, can reflect waves and become unstable to corrugation. Analytical calculations of these phenomena are tractable in the simplest cases only, while their numerical simulations are…

等离子体物理 · 物理学 2023-08-16 William Béthune

When a 2D superconductor is subjected to a strong in-plane magnetic field, Zeeman polarization of the Fermi surface can give rise to inhomogeneous FFLO order with a spatially modulated gap. Further increase of the magnetic field eventually…

强关联电子 · 物理学 2018-07-17 Dimitri Pimenov , Ipsita Mandal , Francesco Piazza , Matthias Punk

In this paper, we introduce a hyperbolic model for entropy dissipative system of viscous conservation laws via a flux relaxation approach. We develop numerical schemes for the resulting hyperbolic relaxation system by employing the…

数值分析 · 数学 2023-12-20 Tuowei Chen , Jiequan Li

In this paper, we consider mathematical modeling and numerical simulation of non-isothermal compressible multi-component diffuse-interface two-phase flows with realistic equations of state. A general model with general reference velocity is…

数值分析 · 数学 2018-08-15 Jisheng Kou , Shuyu Sun

The dynamic phase diagram of vortex lattices driven in disorder is calculated in two and three dimensions. A modified Lindemann criterion for the fluctuations of the distance of neighboring vortices is used, which unifies previous analytic…

超导电性 · 物理学 2009-10-30 Stefan Scheidl , Valerii M. Vinokur

We consider two models of a compressible inviscid isentropic two-fluid flow. The first one describes the liquid-gas two-phase flow. The second one can describe the mixture of two fluids of different densities or the mixture of fluid and…

偏微分方程分析 · 数学 2019-05-01 Lizhi Ruan , Yuri Trakhinin

An extension of quasiclassical Keldysh-Usadel theory to higher spatial dimensions than one is crucial in order to describe physical phenomena like charge/spin Hall effects and topological excitations like vortices and skyrmions, none of…

超导电性 · 物理学 2016-03-15 Morten Amundsen , Jacob Linder

We study the nonlinear Fokker-Planck equation on graphs, which is the gradient flow in the space of probability measures supported on the nodes with respect to the discrete Wasserstein metric. The energy functional driving the gradient flow…

动力系统 · 数学 2017-09-26 Shui-Nee Chow , Wuchen Li , Haomin Zhou

The nonlinear Ginzburg-Landau equations are solved numerically in order to investigate the vortex structure in thin superconducting disks of arbitrary shape. Depending on the size of the system and the strength of the applied magnetic field…

超导电性 · 物理学 2007-05-23 F. M. Peeters , B. J. Baelus

We present a Hamiltonian framework for higher-dimensional vortex filaments (or membranes) and vortex sheets as singular 2-forms with support of codimensions 2 and 1, respectively, i.e. singular elements of the dual to the Lie algebra of…

辛几何 · 数学 2012-01-31 Boris Khesin