长方体液态金属电池滚动垫不稳定性的数值模拟
Numerical simulation of rolling pad instability in cuboid liquid metal batteries
摘要：
滚动垫不稳定性是由具有强烈不同电导率的水平层系统中的电磁相互作用引起的。我们分析了液态金属电池（LMB）的简化模型的不稳定性，LMB是一种有前途的大规模固定能量存储装置。使用OpenFOAM进行电磁耦合界面波的流动和动力学的数值模拟。这一工作证实了先前的结论，即不稳定性是影响电池运行的重要因素。阐明了两个界面的密度差之间的比率所起的关键作用。结果发现，该比率决定的稳定性特征和类型（对称或反对称耦合）的主导界面波。
英文摘要：
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 (LMB), 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. The work confirms the earlier conclusions that the instability is a significant factor affecting 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.
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