Magnetically driven flow in a liquid-metal battery

被引：7

作者：

Davidson, P. A. ^{[1
]}

Wong, O. ^{[1
]}

Atkinson, J. W. ^{[2
]}

Ranjan, A. ^{[3
]}

机构：

[1] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England

[2] British Antarctic Survey, Cambridge CB3 0ET, England

[3] Indian Inst Technol, Dept Mech Engn, Mumbai 400076, Maharashtra, India

来源：

PHYSICAL REVIEW FLUIDS | 2022年 / 7卷 / 07期

关键词：

Compendex;

D O I：

10.1103/PhysRevFluids.7.074701

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We investigate the flow within a liquid-metal battery induced by an externally imposed magnetic field, B-0. An analytical model for laminar flow is proposed and this is found to be in excellent agreement with numerical simulations, not only for weakly forced steady flow, but also for the time-averaged velocity in more strongly forced flows where the motion is either unsteady (but laminar) or else weakly turbulent. Our primary conclusion is that surprisingly weak magnetic fields are capable of destabilizing the flow and inducing turbulence, with turbulence first appearing at B-0 approximate to 1.0G. By comparison, the earth's magnetic field is approximate to 0.5 G. This extreme sensitivity of liquid-metal pools carrying current to an external magnetic field has long been known in the context of other industrial processes.

引用

页数：18

共 17 条

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