scholarly journals Influence of an external magnetic field on forced turbulence in a swirling flow of liquid metal

2009 ◽  
Vol 21 (8) ◽  
pp. 085107 ◽  
Author(s):  
Basile Gallet ◽  
Michael Berhanu ◽  
Nicolas Mordant
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Liquid Metal ◽  
Swirling Flow ◽  
Forced Turbulence

Inertial wave dynamics in a rotating liquid metal

2014 ◽  
Vol 753 ◽  
pp. 472-498 ◽  
Author(s):  
Tobias Vogt ◽  
Dirk Räbiger ◽  
Sven Eckert
Keyword(s):  
Magnetic Field ◽  
Liquid Metal ◽  
Swirling Flow ◽  
Harmonic Wave ◽  
Wave Mode ◽  
Rotating Magnetic Field ◽  
Inertial Waves ◽  
Aspect Ratios ◽  
Inertial Wave ◽  
Wave Modes

AbstractThe dynamics of free and forced inertial waves inside cylinders of different aspect ratios ($\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}A=H_0/2R_0$) were investigated experimentally in this study. The liquid metal GaInSn was chosen as the fluid in order to enable a contactless stimulation of the flow by means of alternating electromagnetic fields. A rotating magnetic field generates the rotating motion of the liquid, whereas periodic modulations of the field strength and short pulses excite specific wave modes. Ultrasound Doppler velocimetry was used to record the flow structure and to identify inertial waves in the set-up. Our experiments demonstrate selective excitation of different inertial wave modes by deliberate variation of the magnetic field parameters. Furthermore, it was found that turbulent perturbations in the boundary layers of the swirling flow are able to induce an inertial wave mode that survives over a long time. Experiments at the fundamental resonance have shown that multiple harmonic wave modes appeared simultaneously. The measured inertial wave frequencies were compared to the predictions of the linear inviscid theory.

scholarly journals The effect of an external magnetic field on the entropy generation in three-dimensional natural convection

2010 ◽  
Vol 14 (2) ◽  
pp. 341-352 ◽  
Author(s):  
Lioua Kolsi ◽  
Awatef Abidi ◽  
Naceur Borjini ◽  
Ben Aïssia
Keyword(s):  
Magnetic Field ◽  
Natural Convection ◽  
External Magnetic Field ◽  
Liquid Metal ◽  
Entropy Generation ◽  
Numerical Study ◽  
Three Dimensional ◽  
Laminar Natural Convection ◽  
The Magnetic Field

A 3-D original numerical study of entropy generation in the case of liquid metal laminar natural convection in a differentially heated cubic cavity and in the presence of an external magnetic field orthogonal to the isothermal walls is carried out. The effect of this field on the various types of irreversibilities is analyzed. It was observed that in the presence of a magnetic field the generated entropy is distributed on the entire cavity and that the magnetic field limits the 3-D character of the distribution of the generated entropy.

The influence of a cylindrical cathode on the electro-vortex flow of liquid metal: Numerical simulations and laboratory experiments

2021 ◽  
Author(s):  
Vladislav Eltishchev ◽  
Sergei Mandrykin ◽  
Ilya Kolesnichenko
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Liquid Metal ◽  
Electric Current ◽  
Laboratory Experiments ◽  
Vortex Flow ◽  
Qualitative Change ◽  
Critical Magnetic Field ◽  
Current Application ◽  
Cylindrical Cell

Abstract The electro-vortex flow of liquid metal in a cylindrical cell, placed into external vertical magnetic field, in case of axial electric current application is studied numerically and experimentally. The results are compared to those previously obtained in case of a localized electric current application. In the absence of the external magnetic field, the comparison shows no qualitative change in the flow structure. In presence of the external magnetic field, a poloidal motion is suppressed. A critical magnetic field of poloidal suppression is shown to be approximately 50% higher in case of axial electric current application.

scholarly journals Dark Current and Magnetic Field in Liquid

2021 ◽  
Vol 3 (6) ◽  
pp. 21-24
Author(s):  
S. A. G Erasimov
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Liquid Metal ◽  
Electric Current ◽  
Dark Current ◽  
Metal Contact ◽  
Clean Water ◽  
Aluminum Electrodes ◽  
The Magnetic Field

The dark electric current arising from the contact of aluminum with clean water decreases with an increase in the induction of the external magnetic field. Changing the distance between the source of the magnetic field and the aluminum electrodes makes it possible to determine the region of formation of the dark current. It turns out that this occurs in the area of liquid-metal contact where the curvature of the electrodes is maximal.

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