Volume 124, Number 2, October 2018
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||16 November 2018|
Magneto-hydrodynamic stability of a liquid metal battery in discharge
University of Greenwich - Park Row, SE10 9LS, London, UK
Received: 21 August 2018
Accepted: 16 October 2018
All liquid three-layer batteries are intended as large-scale electrical energy storage. The paper investigates long-wave interfacial instabilities driven by the electromagnetic forces during dynamic phases of the battery charging/discharging. The liquid metal battery of 20 cm size with sodium metal anode, which is a candidate for experimental and commercial implementation, is shown to be unstable at the discharge state when the top metal layer depth is reduced below a critical level. The numerical model includes the effects of viscous friction and the horizontal wave velocities. The instability does not depend on the initial interface perturbation type.
PACS: 47.35.-i – Hydrodynamic waves / 47.65.-d – Magnetohydrodynamics and electrohydrodynamics
© EPLA, 2018
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