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We consider the entropy production of a strongly coupled bipartite system. The total entropy production can be partitioned into various components, which we use to define local versions of the Second Law that are valid without the usual…

统计力学 · 物理学 2022-09-29 Gavin E. Crooks , Susanne E. Still

We consider a system describing the long-time dynamics of an hydrodynamical, density-dependent flow under the effects of gravitational forces. We prove that if the Froude number is sufficiently small such system is globally well posed with…

偏微分方程分析 · 数学 2017-04-07 Stefano Scrobogna

Navier-Stokes equations establish the hydrodynamical problem by definition. The importance of these equations is quite natural to understand if we focus on the role they assume in a large spectrum of dynamical problems which involve…

数学物理 · 物理学 2010-07-30 Michele Romeo

The steady motion of a viscous incompressible fluid in distorted pipes, of finite length, is modeled through the Navier-Stokes equations with mixed boundary conditions: the inflow is given by an arbitrary member of the Lions-Magenes class…

偏微分方程分析 · 数学 2025-06-10 Alessio Falocchi , Ana Leonor Silvestre , Gianmarco Sperone

We consider the steady-state statistics of turbulence sustained by a large-scale force. The Kolmogorov flux relation (4/5-law) is shown to be a particular case of the general relation on the current-density correlation function. Using that,…

混沌动力学 · 物理学 2011-03-28 Gregory Falkovich , Itzhak Fouxon , Yaron Oz

Two-dimensional turbulence governed by the so-called $\alpha$ turbulence equations, which include the surface quasi-geostrophic equation ($\alpha=1$), the Navier--Stokes system ($\alpha=2$), and the governing equation for a shallow flow on…

混沌动力学 · 物理学 2007-05-23 Chuong V. Tran

We discuss a minimal generalization of the incompressible Navier-Stokes equations to describe the solvent flow in an active suspension. To account phenomenologically for the presence of an active component driving the ambient fluid flow, we…

软凝聚态物质 · 物理学 2015-04-10 Jonasz Słomka , Jörn Dunkel

We derive equations of motion of hydrodynamic fluctuations performing perturbative expansion of the energy-momentum conservation equations around the boost invariant solution in one-dimensional expanding system. In the course of derivation,…

核理论 · 物理学 2024-03-06 Shin-ei Fujii , Tetsufumi Hirano

We investigate dissipative anomalies in a turbulent fluid governed by the compressible Navier-Stokes equation. We follow an exact approach pioneered by Onsager, which we explain as a non-perturbative application of the principle of…

流体动力学 · 物理学 2018-02-21 Gregory L. Eyink , Theodore D. Drivas

We derive a continuum sharp-interface model for moving contact lines with soluble surfactants in a thermodynamically consistent framework. The model consists of the isothermal two-phase incompressible Navier-Stokes equations for the fluid…

流体动力学 · 物理学 2021-08-11 Quan Zhao , Weiqing Ren , Zhen Zhang

The random forced Navier-Stokes equation can be obtained as a variational problem of a proper action. In virtue of incompressibility, the integration over transverse components of the fields allows to cast the action in the form of a large…

流体动力学 · 物理学 2007-05-23 R. Collina , R. Livi , A. Mazzino

The aim of this paper is to develop a general constitutive scheme within continuum thermodynamics to describe the behavior of heat flow in deformable media. Starting from a classical thermodynamic approach, the rate-type constitutive…

数学物理 · 物理学 2023-12-18 Claudio Giorgi , Federico Zullo

We present a continuum theory to demonstrate the implications of considering general tractions developed on arbitrary control volumes where the surface enclosing it lacks smoothness. We then tailor these tractions to recover the…

流体动力学 · 物理学 2021-02-03 Luis Espath

This paper is concerned with the Cauchy problem of Navier-Stokes equations for compressible viscous heat-conductive fluids with far-field vacuum at infinity in $\R^3$. For less regular data and weaker compatibility condition than those…

偏微分方程分析 · 数学 2021-10-28 Suhua Lai , Hao Xu , Jianwen Zhang

We show how causal relativistic Navier-Stokes equations arise from the relativistic Boltzmann equation: the causality is preserved via a judicious choice of the zero modes of the collision operator. A completely analogous procedure may be…

高能物理 - 理论 · 物理学 2022-10-12 Raphael E. Hoult , Pavel Kovtun

We derive a fourth order entropy stable extension of the Navier-Stokes-Fourier equations into the transition regime of rarefied gases. We do this through a novel reformulation of the closure of conservation equations derived from the…

流体动力学 · 物理学 2026-01-27 F. A. Baidoo , I. M. Gamba , T. J. R. Hughes , M. R. A. Abdelmalik

We consider the compressible three dimensional Navier Stokes and Euler equations. In a suitable regime of barotropic laws, we construct a set of finite energy smooth initial data for which the corresponding solutions to both equations…

偏微分方程分析 · 数学 2020-06-17 Frank Merle , Pierre Raphael , Igor Rodnianski , Jeremie Szeftel

In the presence of vacuum, the physical entropy for polytropic gases behaves singularly and it is thus a challenge to study its dynamics. It is shown in this paper that the boundedness of the entropy can be propagated up to any finite time…

偏微分方程分析 · 数学 2020-02-11 Jinkai Li , Zhouping Xin

We derive a class of energy preserving boundary conditions for incompressible Newtonian flows and prove local-in-time well-posedness of the resulting initial boundary value problems, i.e. the Navier-Stokes equations complemented by one of…

偏微分方程分析 · 数学 2015-10-22 Dieter Bothe , Matthias Köhne , Jan Prüss

This paper concerns the existence of global weak solutions \`a la Leray for compressible Navier-Stokes equations with a pressure law that depends on the density and on time and space variables $t$ and $x$. The assumptions on the pressure…

偏微分方程分析 · 数学 2021-08-11 Didier Bresch , Pierre Emmanuel Jabin , Fei Wang