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We consider the magnetic field induced by the steady or the quasi-steady electric currents that flow along the straight wires, which are equidistantly arranged on the hyperboloid. The spatial distribution of the magnetic field and the force…

物理教育 · 物理学 2026-04-01 Roman Krcmar , Andrej Gendiar , Tomotoshi Nishino

Magnetic geodesics describe the trajectory of a particle in a Riemannian manifold under the influence of an external magnetic field. In this article, we use the heat flow method to derive existence results for such curves. We first…

微分几何 · 数学 2018-03-12 Volker Branding , Florian Hanisch

We investigate inviscid instability in an electrically conducting fluid affected by a parallel magnetic field. The case of low magnetic Reynolds number in Poiseuille flow is considered. When the magnetic field is sufficiently strong, for a…

流体动力学 · 物理学 2013-07-22 A. V. Monwanou , J. B. Chabi Orou

Thermal convection in an electrically conducting fluid (for example, a liquid metal) in the presence of a static magnetic field is considered in this chapter. The focus is on the extreme states of the flow, in which both buoyancy and…

流体动力学 · 物理学 2019-02-14 Oleg Zikanov , Yaroslav Listratov , Xuan Zhang , Valentin Sviridov

In this paper, we are concerned with the initial boundary values problem associated to the compressible viscous non-resistive and heat-conducting magnetohydrodynamic flow, where the magnetic field is vertical. More precisely, by exploiting…

偏微分方程分析 · 数学 2024-08-15 Xiaoping Zhai , Yongsheng Li , Yajuan Zhao

Initial results from the Madison Dynamo Experiment provide details of the inductive response of a turbulent flow of liquid sodium to an applied magnetic field. The magnetic field structure is reconstructed from both internal and external…

等离子体物理 · 物理学 2007-05-23 M. D. Nornberg , E. J. Spence , R. D. Kendrick , C. M. Jacobson , C. B. Forest

The linear stability of electrically driven flow of liquid metal in circular channel in the presence of vertical magnetic field is studied. It is shown that the instability threshold of such flow is determined by magnetorotational…

天体物理学 · 物理学 2007-11-20 I. V. Khalzov , A. I. Smolyakov , V. I. Ilgisonis

A sufficient condition for the linear stability of three dimensional equilibria with incompressible flows parallel to the magnetic field is derived. The condition involves physically interpretable terms related to the magnetic shear and the…

等离子体物理 · 物理学 2009-11-13 G. N. Throumoulopoulos , H. Tasso

Development of a two-phase incompressible solver for magnetic flows in the magnetostatic case is presented. The proposed numerical toolkit couples the Navier-Stokes equations of hydrodynamics with Maxwell's equations of electromagnetism to…

流体动力学 · 物理学 2024-06-04 Paria Makaremi-Esfarjani , Andrew J. Higgins , Alireza Najafi-Yazdi

The thermomagnetic convection of magnetic fluids in a cylindrical geometry subjected to a homogeneous magnetic field is studied. The study is motivated by a novel thermal instability [W. Luo et al., Phys. Rev. Lett. 82, 4134 (1999)]. As…

斑图形成与孤子 · 物理学 2009-11-07 Adrian Lange

We analyse numerically the linear stability of a liquid metal flow in a rectangular duct with perfectly electrically conducting walls subject to a uniform transverse magnetic field. A non-standard three dimensional vector stream…

流体动力学 · 物理学 2012-09-26 Jānis Priede , Svetlana Aleksandrova , Sergei Molokov

Axisymmetric equilibria with incompressible flows of arbitrary direction are studied in the framework of magnetohydrodynamics under a variety of physically relevant side conditions. To this end a set of pertinent non-linear ODEs are…

等离子体物理 · 物理学 2007-05-23 G. N. Throumoulopoulos , H. Tasso , G. Poulipoulis

A diffusion's induced transport is defined for a linear model of a Fokker-Plank equation under periodic boundary conditions in one-dimensional geometry. The flow is generated by a diffusion and a periodic deriving force induced by a…

数学物理 · 物理学 2008-09-04 Gershon Wolansky

We initiate numerical studies of differentially rotating magnetised (proto) neutron stars by studying - through construction from first principles - the coupling between an assumed differential rotation and an impressed magnetic field. For…

天体物理学 · 物理学 2007-05-23 A. V. Thampan

Small steady-state deformational oscillations of a drop of a viscous magnetic liquid in a non-stationary uniform magnetic field are theoretically investigated for low Reynolds numbers. The drop is suspended in another viscous magnetic…

流体动力学 · 物理学 2022-06-22 Alexander N. Tyatyushkin

An overview of the effect of a magnetic field gradient on fluids with linear magnetic susceptibilities is given. It is shown that two commonly encountered expressions, the magnetic field gradient force and the concentration gradient force…

化学物理 · 物理学 2022-12-16 T. A. Butcher , J. M. D. Coey

We study anomalous magnetohydrodynamics in a longitudinal boost invariant Bjorken flow with constant anisotropic electric conductivities as outlined in Ref. [1]. For simplicity, we consider a neutral fluid and a force-free magnetic field in…

高能物理 - 唯象学 · 物理学 2021-02-03 Ren-jie Wang , Patrick Copinger , Shi Pu

Magnetic field generation in three-dimensional Rayleigh-B\'enard convection of an electrically conducting fluid is studied numerically by fixing the Prandtl number at $P=0.3$ and varying the Rayleigh number (Ra) as a control parameter. A…

流体动力学 · 物理学 2017-10-11 R. Chertovskih , E. L. Rempel , E. V. Chimanski

The non-collisional interaction between conducting obstacles and magnetized plasma winds can be found in different scenarios, from the interaction occurring between regions inside galaxy clusters to the interaction between the solar wind…

地球与行星天体物理 · 物理学 2015-06-22 Norberto Romanelli , Daniel Gomez , Cesar Bertucci , Magda Delva

The axisymmetric kinematic dynamo problem is reconsidered and a number of open questions are answered. Apart from axisymmetry and smoothness of data and solution we deal with this problem under quite general conditions, i.e. we assume a…

太阳与恒星天体物理 · 物理学 2019-09-30 Ralf Kaiser , Andreas Tilgner