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A new theory for the dynamics of the magnetic particles and their magnetic moments in ferrofluids is developed. Based on a generalized Lagrangian formulation for the equations of motion of the colloidal particle, we introduce its…

统计力学 · 物理学 2007-05-23 Claudio Scherer , Hans-Georg Matuttis

We define the Landau problem on two-dimensional surfaces of revolution of the second order: ellipsoid, hyperboloid and paraboloid. We start form the two-center MICZ-Kepler system Hamiltonian and then making the reduction into the various…

数学物理 · 物理学 2014-09-22 Eva Gevorgyan , Armen Nersessian , Vadim Ohanyan , Evgeny Tolkachev

We consider viscous free-boundary magnetohydrodynamics(MHD) under vacuum in $\mathbb{R}^3$, especially when vacuum magnetic field is identically zero. It is a central problem in mathematics to perform vanishing viscosity limit to get a…

偏微分方程分析 · 数学 2017-04-13 Donghyun Lee

The effect of a uniform spanwise magnetic field on a turbulent channel flow is investigated for the case of low magnetic Reynolds number. DNS and LES computations are performed for two values of the hydrodynamic Reynolds number (10^4 and…

流体动力学 · 物理学 2008-10-14 Dmitry Krasnov , Oleg Zikanov , Joerg Schumacher , Thomas Boeck

The electromagnetic response of bilayer graphene in a magnetic field is studied in comparison with that of monolayer graphene. Both types of graphene turn out to be qualitatively quite similar in dielectric and screening characteristics,…

介观与纳米尺度物理 · 物理学 2009-11-13 T. Misumi , K. Shizuya

By perceiving gauge invariance as an analytical tool in order to get insight into the states of the "generalized Landau problem" (a charged quantum particle moving inside a magnetic, and possibly electric field), and motivated by an early…

介观与纳米尺度物理 · 物理学 2017-03-08 Georgios Konstantinou , Konstantinos Moulopoulos

Symmetries and conservation laws associated with the ideal Einstein-Euler system, for stationary and axisymmetric stars, can be utilized to define a set of flow constants. These quantities are conserved along flow lines in the sense that…

广义相对论与量子宇宙学 · 物理学 2023-10-05 Arthur G. Suvorov , Kostas Glampedakis

The Fokker-Planck equation provides complete statistical description of a particle undergoing random motion in a solvent. In the presence of Lorentz force due to an external magnetic field, the Fokker-Planck equation picks up a tensorial…

This study investigates unsteady boundary layer phenomena in electrically conducting fluids subjected to static magnetic fields. Using a semi-explicit similarity transformation method, the momentum equation associated with the Stokes stream…

流体动力学 · 物理学 2025-04-10 Jing-Yu Fu , Ming-Jiu Ni , Nian-Mei Zhang

Because different constraints are imposed, stability conditions for dissipationless fluids and magnetofluids may take different forms when derived within the Lagrangian, Eulerian (energy-Casimir), or dynamical accessible frameworks. This is…

等离子体物理 · 物理学 2016-11-23 T. Andreussi , P. J. Morrison , F. Pegoraro

We consider graphene in the presence of external magnetic field and elastic deformations that cause emergent magnetic field. The total magnetic field results in the appearance of Landau levels in the spectrum of quasiparticles. In addition,…

介观与纳米尺度物理 · 物理学 2016-10-04 Z. V. Khaidukov , M. A. Zubkov

In the preceding paper, we derived Coulomb-gas and sine-Gordon Hamiltonians to describe the Kosterlitz-Thouless transition on a fluctuating surface. These Hamiltonians contain couplings to Gaussian curvature not found in a rigid flat…

凝聚态物理 · 物理学 2009-10-28 Jeong-Man Park , T. C. Lubensky

Stabilizing plasma dynamics through externally applied electric and magnetic fields is a fundamental control problem. We study this question for a plasma evolving under a uniform external magnetic field. Although the governing dynamics are…

等离子体物理 · 物理学 2026-03-18 Peiyi Chen , Rogerio Jorge , Qin Li , Yukun Yue

The concept of magnetic connections is extended to non-ideal relativistic magnetohydrodynamical plasmas. Adopting a general set of equations for relativistic magnetohydrodynamics including thermal-inertial, thermal electromotive, Hall and…

等离子体物理 · 物理学 2015-05-05 Felipe A. Asenjo , Luca Comisso

This paper develops the geometry and analysis of the averaged Euler equations for ideal incompressible flow in domains in Euclidean space and on Riemannian manifolds, possibly with boundary. The averaged Euler equations involve a parameter…

We deduce a generalized hydrodynamic limit for the box-ball system, which explains how the densities of solitons of different sizes evolve asymptotically under Euler space-time scaling. To describe the limiting soliton flow, we introduce a…

数学物理 · 物理学 2026-04-15 David A. Croydon , Makiko Sasada

Solutions to the compressible Euler equations in all dimensions have been shown to develop finite-time singularities from smooth initial data such as shocks and cusps. There is an extraordinary list of results on this subject. When the…

偏微分方程分析 · 数学 2025-07-10 Jiahong Wu , Fuyi Xu , Xiaoping Zhai

The main result presented here is that the flow associated with a riemannian metric and a non zero magnetic field on a compact oriented surface without boundary, under assumptions of hyperbolic type, cannot have the same length spectrum of…

微分几何 · 数学 2016-08-16 Stephane Grognet

Extended magnetohydrodynamics (XMHD) is a fluid plasma model generalizing ideal MHD by taking into account the impact of Hall drift effects and the influence of electron inertial effects. XMHD has a Hamiltonian structure which has received…

偏微分方程分析 · 数学 2024-06-26 Christophe Cheverry , Nicolas Besse

We consider the Riemann problem for relativistic flows of polytropic fluids and find relations for the flow characteristics. Evolution of physical quantities take especially simple form for the case of cold magnetized plasmas. We find…

高能天体物理现象 · 物理学 2015-05-18 Maxim Lyutikov