Spin-up of the Vortex Flow of Liquid Metal in a Thin Layer Placed in An Alternating Magnetic Field

S. I. Banshchikov; I. V. Kolesnichenko; A. O. Poluyanov; and R. I. Khalilov

doi:10.17804/2410-9908.2024.5.069-078

S. I. Banshchikov, I. V. Kolesnichenko, A. O. Poluyanov, and R. I. Khalilov

SPIN-UP OF THE VORTEX FLOW OF LIQUID METAL IN A THIN LAYER PLACED IN AN ALTERNATING MAGNETIC FIELD

DOI: 10.17804/2410-9908.2024.5.069-078

The paper studies the transient nonequilibrium modes of a vortex flow in a thin liquid metal layer. The flow is caused by electromagnetic forces generated by the interaction of an alternating magnetic field and electric current induced by it. The most stable variant of the flow, in the form of two large-scale vortices, is studied. In this instance, the region where the alternating magnetic field is generated is situated in close proximity to the edge of the longer side of the rectangular liquid metal layer. Upon activation of the inductor, the flow evolves from rest to some equilibrium state. Conversely, upon deactivation, the flow diminishes. The study is conducted on a gallium eutectic alloy by means of an ultrasonic Doppler velocimeter. Two parameters determining the intensity of the force action are varied: the strength and frequency of the electric current flowing through the inductor windings. The durations of flow evolution and decay depending on the varying process parameters are evaluated. Vortex flow studies can be useful for designing MHD pumps and for stirring liquid metals.

Acknowledgement: The work was performed according to state assignment No. 122030200191-9.

Keywords: experiment with liquid metal, magnetohydrodynamics, transient modes, thin layer, electrovortex flow evolution, ultrasonic Doppler velocimeter

References:

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С. И. Банщиков, И. В. Колесниченко, А. О. Полуянов, Р. И. Халилов

РАЗГОН ВИХРЕВОГО ТЕЧЕНИЯ ЖИДКОГО МЕТАЛЛА В ПЛОСКОМ СЛОЕ, ПОМЕЩЕННОМ В ПЕРЕМЕННОЕ МАГНИТНОЕ ПОЛЕ

Работа посвящена изучению переходных неравновесных режимов вихревого течения в плоском слое жидкого металла. Течение вызвано действием электромагнитных сил, возникающих при взаимодействии переменного магнитного поля и индуцированного им электрического тока. Для исследования выбран наиболее устойчивый вариант течения в виде двух крупномасштабных вихрей. В данном случае область, в которой генерируется переменное магнитное поле, расположена рядом с краем длинной стороны прямоугольного слоя жидкого металла. При включении индуктора течение развивается из состояния покоя до некоторого равновесного состояния, а при отключении индуктора, наоборот, затухает. Исследование выполнено на галлиевой эвтектике с помощью ультразвукового доплеровского анемометра. В данной работе варьируются два параметра, определяющие интенсивность силового воздействия: сила и частота электрического тока, который течет по обмоткам индуктора. Получена оценка времени развития и затухания течения в зависимости от варьируемых параметров процесса. Исследования вихревых течений могут быть полезны при проектировании МГД-насосов, а также для перемешивания жидких металлов.

Благодарность: Работа выполнена в соответствии с государственным заданием № 122030200191-9.

Ключевые слова: эксперимент с жидким металлом, магнитная гидродинамика, переходные режимы, плоский слой, развитие вихревого течения, ультразвуковой доплеровский анемометр

Библиография:

Kolesnichenko I., Khalilov R., Khripchenko S. Vortical flow of conducting fluid driven by an alternating magnetic field in a plane channel // Magnetohydrodynamics. – 2007. – Vol. 43, No. 1. – P. 45–52. – DOI: 10.22364/mhd.43.1.5.
The impact of flow induced by rotating magnetic fields on processes in a molten conductive medium / R. I. Khalilov, A. D. Mamykin, R. S. Okatev, I. V. Kolesnichenko // Diagnostics, Resource and Mechanics of materials and structures. – 2023. – Iss. 3. – P. 6–16. – DOI: 10.17804/2410-9908.2023.3.006-016. – URL: http://dream-journal.org/issues/2023-3/2023-3_396.html
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Contactless generation of cavitation in high temperature liquid metals and its impact on particle dispersion in solidified iron and steel samples / M. Sarma, I. Grants, T. Herrmannsdörfer, G. Gerbeth // Journal of Materials Processing Technology. – 2021. – Vol. 291. – P. 117041. – DOI: 10.1016/j.jmatprotec.2021.117041.
Noncontact rotation, levitation, and acceleration of flowing liquid metal wires / Y. He, J. Tang, K. Kalantar-Zadeh, M. D. Dickey, X. Wang // Proceedings of the National Academy of Sciences of the United States of America. – 2022. – Vol. 119, No. 6 – P. e2117535119. – DOI: 10.1073/pnas.2117535119.
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Analysis on the deflection angle of columnar dendrites of continuous casting steel billets under the influence of mold electromagnetic stirring / X. Wang, S. Wang, L. Zhang, S. Sridhar, A. Conejo, X. Liu // Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. – 2016. – Vol. 47, No. 11. – P. 5496–5509. – DOI: 10.1007/s11661-016-3695-0.
Behavior of non-conducting particles in molten aluminium cast into electromagnetic molds / V. Timofeev, M. Pervukhin, E. Vinter, N. Sergeev // Magnetohydrodynamics. – 2020. – Vol. 56, No. 4. – P. 459–472. – DOI: 10.22364/mhd.56.4.10.
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Losev G., Kolesnichenko I. The influence of the waveguide on the quality of measurements with ultrasonic Doppler velocimetry // Flow measurement and instrumentation. – 2020. – Vol. 75. – P. 101786. – DOI: 10.1016/j.flowmeasinst.2020.101786.
Numerical and experimental investigation of electro-vortex flow in a cylindrical container / K. Liu, F. Stefani, N. Weber, T. Weier, B. W. Li // Magnetohydrodynamics. – 2020. – Vol. 56, No. 1. – P. 27–41. – DOI: 10.22364/mhd.56.1.3.
Combined measurement of velocity and temperature in liquid metal convection / T. Zürner, J. Schumacher, F. Schindler, T. Vogt, S. Eckert // Journal of Fluid Mechanics. – 2019. – Vol. 876. – P. 1108–1128. – DOI: 10.1017/jfm.2019.556.
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Библиографическая ссылка на статью

Spin-up of the Vortex Flow of Liquid Metal in a Thin Layer Placed in An Alternating Magnetic Field / S. I. Banshchikov, I. V. Kolesnichenko, A. O. Poluyanov, and R. I. Khalilov // Diagnostics, Resource and Mechanics of materials and structures. - 2024. - Iss. 5. - P. 69-78. -
DOI: 10.17804/2410-9908.2024.5.069-078. -
URL: http://dream-journal.org/issues/content/article_468.html
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