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Numerical simulation of rolling pad instability in cuboid liquid metal batteries
Applied Physics Reviews ( IF 12.750 ) Pub Date : 2019-12-06 , DOI: 10.1063/1.5123170
Oleg Zikanov

The rolling pad instability is caused by electromagnetic interactions in systems of horizontal layers with strongly different electric conductivities. We analyze the instability for a simplified model of a liquid metal battery, a promising device for large-scale stationary energy storage. Numerical simulations of the flow and the dynamics of electromagnetically coupled interfacial waves are performed using OpenFOAM. This work confirms the earlier conclusions that the instability is a significant factor affecting the battery’s operation. The critical role played by the ratio between the density differences across the two interfaces is elucidated. It is found that the ratio determines the stability characteristics and the type (symmetrically or antisymmetrically coupled) of dominant interfacial waves.
更新日期:2019-12-31

 

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