Experimental study of rough spherical Couette flows: Increasing helicity toward a dynamo state
Experimental study of rough spherical Couette flows: Increasing helicity toward a dynamo state
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DOI：
10.1103/physrevfluids.6.033801
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发表时间：
2021-03
期刊：
影响因子：
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通讯作者：
R. Rojas;A. Perevalov;Till Zürner;D. Lathrop
中科院分区：
文献类型：
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作者：
R. Rojas;A. Perevalov;Till Zürner;D. Lathrop
液态金属中的球形库埃特流是在实验室中产生磁发电机状态的合适候选者。然而，在我们的3米直径的实验结果表明，一个流动的螺旋度的增强可能是必要的。以前的工作建议粗糙的内球边界，通过添加挡板，以实现这些目标。在目前的工作中，我们进行流体动力学研究的效果不同的挡板设计在40厘米的水实验。结果指出，这些模型之一是一个有前途的升级，我们将在我们的3米实验中使用，以有效地增加我们获得发电机行动的机会。
Spherical Couette flows in liquid metals are a suitable candidate for generating magnetic dynamo states in the laboratory. However, results in our 3 meter diameter experiment have shown that an enhancement of the flow's helicity is likely required. Previous works suggested roughening the inner sphere boundary by adding baffles in order to achieve these goals. In the present work, we perform hydrodynamic studies of the effect of different baffle designs in a 40 cm water experiment. Results point to one of these models as a promising upgrade that we will use in our 3 m experiment to effectively increase our chances of obtaining dynamo action.