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A stochastic Euler equation is proposed, describing the motion of a particle density, forced by the random action of virtual photons in vacuum. After time averaging, the Euler equation is reduced to the Reynolds equation, well studied in…

量子物理 · 物理学 2019-05-09 Roumen Tsekov , Eyal Heifetz , Eliahu Cohen

Relativistic hydrodynamics of an isentropic fluid in a gravitational field is considered as the particular example from the family of Lagrangian hydrodynamic-type systems which possess an infinite set of integrals of motion due to the…

广义相对论与量子宇宙学 · 物理学 2009-10-31 Victor P. Ruban

The relativistic fluid is a highly successful model used to describe the dynamics of many-particle systems moving at high velocities and/or in strong gravity. It takes as input physics from microscopic scales and yields as output…

广义相对论与量子宇宙学 · 物理学 2021-07-07 N. Andersson , G. L. C. Comer

This paper examines the mathematical properties of the relativistic diffusion equation. The peculiar solution which Hiscock and Lindblom identified as an instability is shown to emerge from an ill-posed initial value problem. These do not…

统计力学 · 物理学 2009-10-31 Peter Kostaedt , Mario Liu

A second order relativistic hydrodynamic theory has been derived using momentum dependent relaxation time in the relativistic transport equation. In order to do that, an iterative technique of gradient expansion approach, namely…

核理论 · 物理学 2021-02-03 Sukanya Mitra

A recently introduced two-phase flow model by Chun Shen is studied in this work. The model is derived to describe the dynamics of immersed water bubbles in liquid water as carrier. Several assumptions are made to obtain a reduced form of…

流体动力学 · 物理学 2025-12-03 Abdul Rab

We derive a linearly causal and stable third-order relativistic fluid-dynamical theory from the Boltzmann equation using the method of moments. For this purpose, we demonstrate that such theory must include novel degrees of freedom,…

核理论 · 物理学 2023-02-21 Caio V. P. de Brito , Gabriel S. Denicol

In cosmological first-order phase transitions, gravitational waves are generated by the collisions of bubble walls and by the bulk motions caused in the fluid. A sizeable signal may result from fast-moving walls. In this work we study the…

宇宙学与河外天体物理 · 物理学 2016-02-16 Leonardo Leitao , Ariel Megevand

We present a general systematic formalism for describing dynamics of fluctuations in an arbitrary relativistic hydrodynamic flow, including their feedback (known as long-time hydrodynamic tails). The fluctuations are described by two-point…

高能物理 - 理论 · 物理学 2019-08-28 Xin An , Gokce Basar , Mikhail Stephanov , Ho-Ung Yee

This work derives exact solutions to the problem of interacting particle density evolution in relativistic and quasi-relativistic approximations for electromagnetic and gravitational interactions. Two types of radial symmetry for the…

数学物理 · 物理学 2025-10-20 E. E. Perepelkin , B. I. Sadovnikov , N. G. Inozemtseva , I. Yu. Baibara

Hydrodynamics is the appropriate "effective theory" for describing any fluid medium at sufficiently long length scales. This paper treats the vacuum as such a medium and derives the corresponding hydrodynamic equations. Unlike a normal…

高能物理 - 唯象学 · 物理学 2016-07-01 P. M. Stevenson

We have derived energy conservation equations from the quaternionic Newton's law that is compatible with Lorentz transformation. This Newton's law yields directly the Euler equation and other equations governing the fluid motion. With this…

综合物理 · 物理学 2011-08-11 Arbab I. Arbab

This paper is concerned with the study of interaction of waves originating from the Riemann problem centred at two different points for a system of equations modelling propagation of elastic waves. The system consists of two equations for…

偏微分方程分析 · 数学 2024-08-20 Kayyunnapara Divya Joseph

This dissertation is about the study of three important issues in the theory of relativistic fluid dynamics: the stability of dissipative fluid dynamics, the shear viscosity, and fluid dynamics with triangle anomaly.(1)The second order…

高能物理 - 唯象学 · 物理学 2011-08-31 Shi Pu

We derive a new formulation of the relativistic Euler equations that exhibits remarkable properties. This new formulation consists of a coupled system of geometric wave, transport, and elliptic equations, sourced by nonlinearities that are…

偏微分方程分析 · 数学 2019-06-21 Marcelo M. Disconzi , Jared Speck

We consider relativistic hydrodynamics in the limit where the number of spatial dimensions is very large. We show that under certain restrictions, the resulting equations of motion simplify significantly. Holographic theories in a large…

高能物理 - 理论 · 物理学 2018-05-09 Moshe Rozali , Evyatar Sabag , Amos Yarom

Relativistic thermodynamics is derived from kinetic equilibrium in a general frame. Based on a novel interpretation of Lagrange multipliers in the equilibrium state we obtain a generic stable but first order relativistic dissipative…

核理论 · 物理学 2012-06-19 P. Ván , T. S. Biró

In this introductory review article, we explore the special relativistic equations of particle motions and the consequent derivation of Einstein's famous formula $E=mc^2$. Next, we study the special relativistic electromagnetic field…

数学物理 · 物理学 2007-05-23 A. Das , A. DeBenedictis , S. Kloster , N. Tariq

We consider models of relativistic matter containing sharp interfaces across which the matter model changes. These models will be relevant for neutron stars with crusts, phase transitions, or for viscous boundaries where the length scale is…

广义相对论与量子宇宙学 · 物理学 2010-01-06 S. T. Millmore , I. Hawke

We present general relativistic correction terms appearing in Newton's gravity to the second-order perturbations of cosmological fluids. In our previous work we have shown that to the second-order perturbations, the density and velocity…

天体物理学 · 物理学 2008-12-18 J. Hwang , H. Noh