Pumping effect in a flat MHD channel with an electrovortex flow

Khripchenko, S.; Kolesnichenko, I.; Dolgikh, V.

doi:10.22364/mhd.44.3.9

Cited by 8 publications

(4 citation statements)

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“…Electro-vortex flow can cause substantial pressure and was therefore recognized as a promising mechanism for pumping liquid metals in technological applications including metals processing and nuclear cooling [190]. Subsequent efforts produced pumps that drive liquid metal in flat channels with corners [191], through Y-and Ψ-shaped junctions [192], in a winding-free pump composed of a pair of junctions [193], and centrifugally [194]. Electro-vortex flow also occurs in cylindrical steel furnaces [195].…”

Section: Electro-vortex Flowmentioning

confidence: 99%

Fluid Mechanics of Liquid Metal Batteries

Kelley

Weier

2018

Applied Mechanics Reviews

108

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The design and performance of liquid metal batteries, a new technology for grid-scale energy storage, depend on fluid mechanics because the battery electrodes and electrolytes are entirely liquid. Here we review prior and current research on the fluid mechanics of liquid metal batteries, pointing out opportunities for future studies. Because the technology in its present form is just a few years old, only a small number of publications have so far considered liquid metal batteries specifically. We hope to encourage collaboration and conversation by referencing as many of those publications as possible here. Much can also be learned by linking to extensive prior literature considering phenomena observed or expected in liquid metal batteries, including thermal convection, magnetoconvection, Marangoni flow, interface instabilities, the Tayler instability, and electro-vortex flow. We focus on phenomena, materials, length scales, and current densities relevant to the liquid metal battery designs currently being commercialized. We try to point out breakthroughs that could lead to design improvements or make new mechanisms important.The story of fluid mechanics research in liquid metal batteries (LMBs) begins with one very important application: grid-scale storage. Electrical grids have almost no energy storage capacity, and adding storage will make them more robust and more resilient even as they incorporate increasing amounts of intermittent and unpredictable wind and solar generation. Liquid metal batteries have unique advantages as a grid-scale storage technology, but their uniqueness also means that designers must consider chemical and physical mechanisms -including fluid mechanisms -that are relevant to few other battery technologies, and in many cases not yet well-understood. We will review the fluid mechanics of liquid metal batteries, focusing on studies undertaken with that technology in mind, and also drawing extensively from prior work considering similar mechanisms in other contexts. In the interest of promoting dialogue across this new field, we have endeavored to include the work of many different researchers, though inevitably some will have eluded our search, and we ask for the reader's sympathy for regrettable omissions. Our story will be guided by technological application, focusing on mechanisms most relevant to liquid metal batteries as built for grid-scale storage. We will consider electrochemistry and theoretical fluid mechanics only briefly because excellent reviews of both topics are already available in the literature. In §1 below we provide an overview and brief introduction to liquid metal batteries, motivated by the present state of worldwide electrical grids, including the various types of liquid metal batteries that have been developed. We consider the history of liquid metal batteries in more detail in §2, connecting to the thermally regenerative electrochemical cells developed in the middle of the twentieth century. Continuing, we consider the fluid mechanisms that are most relevant to ...

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Section: Electro-vortex Flowmentioning

confidence: 99%

Fluid Mechanics of Liquid Metal Batteries

Kelley

Weier

2018

Applied Mechanics Reviews

108

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“…The application of magnetohydrodynamic (MHD) devices has opened wide opportunities for the development of new metallurgical technologies [1,2]. Today, MHD-pumps for transporting molten metal and MHD-stirrers for mixing metal in furnaces, mixers, and continuous casting machines are in use at various industrial enterprises [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…If a device is used to transfer magnesium, the thermal conditions within a conduit should hamper the interaction of magnesium with ferric oxides. Various aspects of modeling heat and hydrodynamic regimes in the channel of MHD-devices are widely discussed in the literature [5][6][7][8][9]. However, the issues related to the study of transient states have not been adequately explored.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Thermal Conditions within the Flow Conduits of MHD-Devices

Glot¹,

Матвеенко²,

Khripchenko³

et al. 2015

SSP

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The paper presents an experimental and theoretical approach to the modeling of non-stationary thermal processes in the elements of MHD-devices. The theoretical part of the approach is based on a mathematical formulation of the non-stationary heat conduction problem and its numerical implementation by the finite-element method. The experimental part involves a series of preliminary and verification tests. A comparison of the results obtained in these experiments with the calculated data allowed us to specify heat conduction coefficients and to pick up space-time parameters of the algorithm to ensure a high degree of adequacy of mathematical description of thermal fields. The approach made it possible to set the process conditions under which the necessary level of preliminary heating of a conduit of the MHD-pump can be achieved without loss of its mechanical strength.

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“…The overall flow structure and dynamic properties of the EVF can be altered not only by changing the electric current value, but also by using multielectrode electric current application of various configurations [18][19][20][21]. Multielectrode setups are widespread in industrial metallurgy [22].…”

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confidence: 99%

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

Eltishchev

Mandrykin

Kolesnichenko

2022

EPL

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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.

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Pumping effect in a flat MHD channel with an electrovortex flow

Cited by 8 publications

References 0 publications

Fluid Mechanics of Liquid Metal Batteries

Fluid Mechanics of Liquid Metal Batteries

Analysis of Thermal Conditions within the Flow Conduits of MHD-Devices

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

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