自由表面液态金属流动的被动和主动电磁稳定
Passive and active electromagnetic stabilization of free-surface liquid metal flows
摘要：
由于不稳定性和其他影响，自由表面液态金属流动往往是不均匀的。然而，某些应用需要恒定、均匀的液态金属厚度。例如，这是核聚变反应堆中的液体壁的情况。有了这个动机，在这里，我们提出了实验结果的Galinstan的自由表面流的稳定。通过具有旋转永磁体的电磁感应泵维持流动。有证据表明，在足够强的磁场的存在下，流动的Galinstan层变得更平坦，无论是单独的（被动稳定）还是与通过液体金属的电流相结合（主动稳定）。结果解释的有效粘度和有效重力，分别。
英文摘要：
Free-surface liquid metal flows tend to be uneven due to instabilities and other effects. Some applications, however, require constant, uniform liquid metal thickness. This is for example the case of liquid walls in nuclear fusion reactors. With this motivation, here we present experimental results on the stabilization of a free-surface flow of Galinstan. The flow was sustained by an electromagnetic induction pump featuring rotating permanent magnets. Evidence is reported of the flowing Galinstan layer becoming flatter in the presence of a sufficiently strong magnetic field, either alone (passive stabilization) or in combination with an electrical current passing through the liquid metal (active stabilization). The results are interpreted in terms of an effective viscosity and effective gravity, respectively.
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