Computational Analysis of Magnetohydrodynamic Flows in a Hairpin Duct Under Uniform Magnetic Fields Applied Parallel to the Flow Plane

2014 ◽  
Vol 66 (3) ◽  
pp. 414-425
Author(s):  
Xuejiao Xiao ◽  
Chang Nyung Kim
Keyword(s):  
Magnetic Fields ◽  
Computational Analysis ◽  
Magnetohydrodynamic Flows ◽  
Flow Plane

Periodic imbalances of kinetic and magnetic energies in rotating magnetohydrodynamic turbulent flows

2020 ◽  
Author(s):  
Rustem Sirazov ◽  
Arakel Petrosyan
Keyword(s):  
Magnetic Fields ◽  
Temporal Dynamics ◽  
Wave Packets ◽  
Homogeneous Turbulence ◽  
Initial Time ◽  
The Sun ◽  
Magnetohydrodynamic Turbulence ◽  
The Earth ◽  
Magnetohydrodynamic Flows ◽  
N Wave

<p>A significant number of observed flows in geophysics, astrophysics, and laboratory experiments are in a state of magnetohydrodynamic turbulence. Among them are flows in the Earth’s outer core, in plasma shells of Earth, planets, and satellites of the solar system with strong magnetic fields, as well as flows in the Sun, stars, and astrophysical disks. Despite significant advances in the study of turbulence under the conditions typical of thermonuclear fusion devices, studies of the fundamental properties of homogeneous turbulence in rotating magnetohydrodynamic flows are still fragmentary and mainly concern turbulence in astrophysical disks, the solar tachocline and convective region of the Sun, and two-dimensional magnetohydrodynamic flows on the β-plane. Only in a few exceptional works were the properties of magnetohydrodynamic turbulence studied by simple analytical methods using Fourier series for similarity parameters, characteristic of the Earth’s core.</p><p>The aim of this work is to study the influence of the interaction of Alfvén wave packets on the dynamics of homogeneous turbulence. The method of calculation o magnetohydrodynamic turbulence we developed allows numerical simulation at large characteristic times and large external magnetic fields. The proposed method of setting the initial conditions for the velocity field makes it possible to satisfy the divergence-free, homogeneity, and turbulence isotropy conditions, as well as to set an arbitrary spectral distribution of the energy at the initial time without additional calculations. Numerical experiments demonstrate a nontrivial behavior of turbulent kinetic and magnetic energies. It is shown that periodic imbalance in energies occurs in the system in the form of conversion of kinetic energy into magnetic energy and vice versa. The analysis of the results shows that the detected nontrivial temporal dynamics of turbulence is caused by the periodic collisions of Alfvén wave packets.</p><p>This work was supported by the Russian Foundation for Basic Research (project no. 19-02-00016).</p>

Magnetohydrodynamic Flows and Turbulence: a report on the Fourth Beer-Sheva Seminar

1984 ◽  
Vol 148 ◽  
pp. 461-476 ◽  
Author(s):  
H. Branover ◽  
M. Mond ◽  
E. S. Pierson
Keyword(s):  
Power Generation ◽  
Magnetic Fields ◽  
Single Phase ◽  
Nuclear Fission ◽  
Two Phase Flows ◽  
Two Phase ◽  
Beer Sheva ◽  
Mhd Flows ◽  
Magnetohydrodynamic Flows

This paper is a summary of the Fourth Beer-Sheva Seminar on Magnetohydrodynamic (MHD) Flows and Turbulence held in Israel during 27 February–2 March 1984 with 67 participants from 13 countries. Reviews and contributed papers were presented on laminar and turbulent single-phase and two-phase MHD flows, turbulent and two-phase flows without magnetic fields, and applications of MHD in power generation, in nuclear fission and fusion and in metallurgy.

On magnetohydrodynamic flows with aligned magnetic fields

1964 ◽  
Vol 19 (1) ◽  
pp. 49-59 ◽  
Author(s):  
M. B. Glauert
Keyword(s):  
Magnetic Field ◽  
Boundary Layer ◽  
Magnetic Fields ◽  
Boundary Layers ◽  
Flow Patterns ◽  
Basic Flow ◽  
Conducting Fluid ◽  
Magnetic Diffusivity ◽  
Magnetohydrodynamic Flows ◽  
Aligned Magnetic Field

The boundary layers due to finite viscosity and magnetic diffusivity are studied in relation to two models of the flow of a conducting fluid past a body in an aligned magnetic field. In each case it is deduced that the growth of the boundary layer may have substantial effects, such as to raise doubts about the validity of the assumed basic flow patterns.

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