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Simultaneous diffusive and inertial motion of Brownian particles in laminar Couette flow is investigated via Lagrangian and Eulerian descriptions to determine the effect of particle inertia on diffusive transport in the long-time. The…

统计力学 · 物理学 2010-08-13 Yannis Drossinos , Michael W. Reeks

We introduce a notion of abelian cohomology in the context of smooth flows. This is an equivalence relation which is weaker than the standard cohomology equivalence relation for flows. We develop Livshits theory for abelian cohomology over…

动力系统 · 数学 2020-05-19 Andrey Gogolev , Federico Rodriguez Hertz

Flow instability and turbulent transition can be well explained using a new proposed theory--Energy gradient theory [1]. In this theory, the stability of a flow depends on the relative magnitude of energy gradient in streamwise direction…

流体动力学 · 物理学 2007-05-23 Hua-Shu Dou

We prove a quantitative reverse isoperimetric inequality for embedded surfaces with Willmore energy bounded away from $8\pi$. We use this result to analyze the negative $L^2$ gradient flow of the Willmore energy plus a positive multiple of…

偏微分方程分析 · 数学 2020-09-28 Simon Blatt

Internally actuated elastic particles are widely used in biomedical applications. It is imperative to understand the dynamics of such particles in pressure-driven microfluidic devices to manipulate their motion. We analytically examine the…

流体动力学 · 物理学 2026-03-31 Shashikant Verma , Navaneeth K. Marath

We study the asymptotic convergence of solutions as $t\rightarrow\infty$ of $\partial_t u=-f(u)+\int f(u)$, a nonlocal differential equation that is formally a gradient flow in a constant-mass subspace of $L^2$ arising from simplified…

经典分析与常微分方程 · 数学 2024-09-16 Sangmin Park , Robert L. Pego

It is easy to reason that gravity might be the effect of a fluid in disguise, as it will naturally arise in emergent gravity models where gravity is due to the effect of some fundamental particles, with the latter expected to behave…

广义相对论与量子宇宙学 · 物理学 2023-01-16 Jianwei Mei

We derive the hydrodynamic equations for nematic liquid crystals lying on curved substrates. We invoke the Lagrange-Rayleigh variational principle to adapt the Ericksen-Leslie theory to two-dimensional nematics in which a degenerate…

软凝聚态物质 · 物理学 2016-08-24 Gaetano Napoli , Luigi Vergori

In this article we use Gaussian measure on $\mathbb{R}^N$ to define the coefficients of an elliptic diffusion on an open cone of $\mathbb{R}^2$. We prove the existence and uniqueness of a stationary distribution for this diffusion. In a…

概率论 · 数学 2026-02-18 Alain-Sol Sznitman , Klaus Widmayer

The Euler-Maxwell system as a hydrodynamic model for plasma physics to describe the dynamics of the compressible electrons in a constant charged non-moving ion background is studied. The global smooth flow with small amplitude is…

偏微分方程分析 · 数学 2011-07-12 Renjun Duan

Two fundamental models in plasma physics are given by the Vlasov-Maxwell-Boltzmann system and the compressible Euler-Maxwell system which both capture the complex dynamics of plasmas under the self-consistent electromagnetic interactions at…

偏微分方程分析 · 数学 2023-06-02 Renjun Duan , Dongcheng Yang , Hongjun Yu

We establish the anomalous mean dissipation rate of energy in the inviscid limit for a stochastic shell model of turbulent fluid flow. The proof relies on viscosity independent bounds for stationary solutions and on establishing ergodic and…

数学物理 · 物理学 2014-04-08 Susan Friedlander , Nathan Glatt-Holtz , Vlad Vicol

I shortly describe the main results on elastically driven instabilities and elastic turbulence in viscoelastic inertia-less flows with curved streamlines. Then I describe a theory of elastic turbulence and prediction of elastic waves at…

流体动力学 · 物理学 2022-06-08 V. Steinberg

We prove a relation between the scaling $h^\beta$ of the elastic energies of shrinking non-Euclidean bodies $S_h$ of thickness $h\to 0$, and the curvature along their mid-surface $S$. This extends and generalizes similar results for plates…

偏微分方程分析 · 数学 2019-01-23 Cy Maor , Asaf Shachar

Relative to the Gaussian measure on $\mathbb{R}^d$, entropy and Fisher information are famously related via Gross' logarithmic Sobolev inequality (LSI). These same functionals also separately satisfy convolution inequalities, as proved by…

信息论 · 计算机科学 2016-08-22 Thomas A. Courtade

The nonlinear Forchheimer equations are used to describe the dynamics of fluid flows in porous media when Darcy's law is not applicable. In this article, we consider the generalized Forchheimer flows for slightly compressible fluids and…

偏微分方程分析 · 数学 2014-05-28 Luan T. Hoang , Thinh T. Kieu , Tuoc V. Phan

This paper is devoted to the investigation of gradient flows in asymmetric metric spaces (for example, irreversible Finsler manifolds and Minkowski normed spaces) by means of discrete approximation. We study basic properties of curves and…

微分几何 · 数学 2023-07-21 Shin-ichi Ohta , Wei Zhao

With the use of thermodynamics and general equilibrium conditions only, we study the entropy of a fluid in the vicinity of the critical point of the liquid-vapor phase transition. By assuming a general form for the coexistence curve in the…

统计力学 · 物理学 2021-06-16 J. C. Obeso-Jureidini , D. Olascoaga , V. Romero-Rochín

We develop a geometric flow framework to investigate two classical shape functionals: the torsional rigidity and the first Dirichlet eigenvalue of the Laplacian. First, by constructing novel deformation paths governed by height-stretching…

偏微分方程分析 · 数学 2026-02-17 Yong Huang , Qinfeng Li , Shuangquan Xie , Hang Yang

We consider a parabolic obstacle problem for Euler's elastic energy of graphs with fixed ends. We show global existence, well-posedness and subconvergence provided that the obstacle and the initial datum are suitably 'small'. For symmetric…

偏微分方程分析 · 数学 2022-02-22 Marius Müller