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In this work we investigate the existence and uniqueness of Struwe-like solutions for a system of partial differential equations modeling the dynamics of magnetoviscoelastic fluids. The considered system couples a Navier-Stokes type…

偏微分方程分析 · 数学 2021-03-03 Francesco De Anna , Joshua Kortum , Anja Schlömerkemper

A self-consistent, thermodynamic approach is employed to derive the wave energy of a magnetohydrodynamic system within the harmonic approximation and to obtain the familiar dispersion relation from the resulting equation of motion. The…

等离子体物理 · 物理学 2008-02-03 S. Chatterjee , P. S. Joarder

A two-dimensional fluid, stirred at high wavenumbers and damped by both viscosity and linear friction, is modeled by a statistical field theory. The fluid's long-distance behavior is studied using renormalization-group (RG) methods, as…

混沌动力学 · 物理学 2008-12-18 Jackson R. Mayo

We derive the equations of motion of relativistic magnetohydrodynamics from the Boltzmann equation using the method of moments. We consider a locally electrically neutral system composed of two particle species with opposite charges, with…

高能天体物理现象 · 物理学 2026-02-25 Khwahish Kushwah , Gabriel Silveria Denicol

We present a general scheme to approach the space - time evolution of deformations, currents, and the electric field in charge density waves related to appearance of intrinsic topological defects: dislocations, their loops or pairs, and…

强关联电子 · 物理学 2021-03-02 Serguei Brazovskii , Natasha Kirova

In high-quality conductors, the hydrodynamic regime of electron transport has been recently realized. In this work we theoretically investigate magnetotransport of a viscous electron fluid in samples with electron-impermeable obstacles. We…

介观与纳米尺度物理 · 物理学 2023-08-01 P. S. Alekseev , A. P. Dmitriev

Semi-discrete Runge-Kutta schemes for nonlinear diffusion equations of parabolic type are analyzed. Conditions are determined under which the schemes dissipate the discrete entropy locally. The dissipation property is a consequence of the…

数值分析 · 数学 2015-06-24 Ansgar Jüngel , Stefan Schuchnigg

Recent experimental results suggest that a particular hydrodynamic theory describes charge fluctuations at long wavelengths in the square-lattice Hubbard model. Due to the continuity equation, the correlation functions for the charge and…

强关联电子 · 物理学 2025-02-05 J. Vucicevic , S. Predin , M. Ferrero

We study the influence of conservation laws on entanglement growth. Focusing on systems with U(1) symmetry, i.e., conservation of charge or magnetization, that exhibits diffusive dynamics, we theoretically predict the growth of…

强关联电子 · 物理学 2020-06-25 Marko Znidaric

Bulk matter produced in heavy ion collisions has multiple conserved quantum numbers like baryon number, strangeness and electric charge. The diffusion process of these charges can be described by a diffusion matrix describing the…

核理论 · 物理学 2022-08-31 Arpan Das , Hiranmaya Mishra , Ranjita K. Mohapatra

We show that the relativistic dynamics in a Gaussian random electromagnetic field can be approximated by the relativistic diffusion of Schay and Dudley. Lorentz invariant dynamics in the proper time leads to the diffusion in the proper…

数学物理 · 物理学 2015-05-27 Z. Haba

This paper is concerned with the large-time behavior of solutions to the Cauchy problem on the two-fluid Euler-Maxwell system with collisions when initial data are around a constant equilibrium state. The main goal is the rigorous…

偏微分方程分析 · 数学 2014-12-02 Renjun Duan , Qingqing Liu , Changjiang Zhu

We use the extended relaxation time approximation for the collision kernel, which incorporates a particle-energy dependent relaxation time, to derive second-order viscous hydrodynamics from the Boltzmann equation for a system of massless…

核理论 · 物理学 2023-12-29 Dipika Dash , Sunil Jaiswal , Samapan Bhadury , Amaresh Jaiswal

We derive the second-order hydrodynamic equation for reactive multi-component systems from the relativistic Boltzmann equation. In the reactive system, particles can change their species under the restriction of the imposed conservation…

高能物理 - 唯象学 · 物理学 2016-01-28 Yuta Kikuchi , Kyosuke Tsumura , Teiji Kunihiro

In this paper, we investigate the two-dimensional extension of a recently introduced set of shallow water models based on a regularized moment expansion of the incompressible Navier-Stokes equations…

数值分析 · 数学 2024-11-08 Matthew Bauerle , Andrew J. Christlieb , Mingchang Ding , Juntao Huang

Starting from a microscopic multiparticle Langevin equation, we systematically derive a hydrodynamic description in terms of density and momentum fields for chiral active particles interacting via standard repulsive and nonlocal odd forces.…

软凝聚态物质 · 物理学 2026-01-28 Umberto Marini Bettolo Marconi , Alessandro Petrini , Raphaël Maire , Lorenzo Caprini

This paper develops the basic sets of equations which lead to the conservation laws describing collisionless plasma shock waves. We discuss the evolution of shock waves by wave steepening, derive the Rankine-Hugoniot conditions for…

天体物理学 · 物理学 2008-05-16 R. A. Treumann , C. H. Jaroschek

Tracers in a turbulent flow separate according to the celebrated $t^{3/2}$ Richardson--Obukhov law, which is usually explained by a scale-dependent effective diffusivity. Here, supported by state-of-the-art numerics, we revisit this…

流体动力学 · 物理学 2015-06-05 Rehab Bitane , Jérémie Bec , Holger Homann

Onsager's variational principle is generalized to address the diffusive dynamics of an electrolyte solution composed of charge-regulated macro-ions and counterions. The free energy entering the Rayleighian corresponds to the…

软凝聚态物质 · 物理学 2025-05-26 Bin Zheng , Shigeyuki Komura , David Andelman , Rudolf Podgornik

We investigate the space-time dependence of electromagnetic fields produced by charged participants in an expanding fluid. To address this problem, we need to solve the Maxwell's equations coupled to the hydrodynamics conservation equation,…

高能物理 - 理论 · 物理学 2023-11-23 Ashutosh Dash , Ankit Kumar Panda