论文标题
建模雷利 - 贝纳德对流以及液态金属电池中的电涡流流
Modelling Rayleigh-Bénard convection coupled with electro-vortex flow in liquid metal batteries
论文作者
论文摘要
液态金属电池（LMB）是一种有希望的网格尺度储能技术，可提供每千瓦时的低成本，高能量和当前密度以及较低的淡出率。电池的全液体组成以及温度梯度以及电场和磁场的存在，导致多种流体现象的发生。这些可能会影响电池的流体动力稳定性，从而使它们的相互作用至关重要。在这项工作中，研究了Rayleigh-Bénard对流和电涡流流的相互作用，因为这些类型的流量将存在于从实验室到网格尺度的液体金属电池中。模拟了单层电极，与文献的实验数据相比，计算的结果。发现Rayleigh-Bénard对流在液态金属电极中不稳定。引入2 A电流稳定对流单元，而引入40 A电流导致电极中部区域的电涡流流的优势。这项工作的结果比以前发布的模型更接近实验数据，该模型可洞悉放电液体金属电池的阳极中Rayleigh-Bénard对流与电涡流流之间的相互作用。
Liquid Metal Batteries (LMBs) are a promising grid-scale energy storage technology that offer low costs per kilowatt-hour, high energy and current densities, as well as low fade rates. The all-liquid composition of the batteries, as well as the presence of temperature gradients and electric and magnetic fields, result in the occurrence of multiple fluid phenomena. These can affect the hydrodynamic stability of the battery, thereby making their interactions critical to understand. In this work, the interaction of Rayleigh-Bénard convection and Electro-vortex flow is investigated as these types of flow will be present in Liquid Metal Batteries from laboratory to grid-scale. A single-layer electrode is simulated, and the computed results compared with experimental data from the literature. It was found that Rayleigh-Bénard convection is unsteady in the liquid metal electrode. The introduction of a 2 A current stabilises the convection cells, whilst the introduction of a 40 A current leads to the dominance of Electro-vortex flow at the central region of the electrode. The results in this work matching experimental data closer than previously published models offering insight into the interaction between Rayleigh-Bénard convection and Electro-vortex flow in the anodes of discharging Liquid Metal Batteries.
