Subcritical dynamo bifurcation in the Taylor-Green flow.

Subcritical dynamo bifurcation in the Taylor-Green flow.
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泰勒-格林流中的亚临界发电机分岔。

DOI:
10.1103/physrevlett.99.224501
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发表时间:
2007
影响因子:
8.6
通讯作者:
J. Pinton
J. Pinton
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Y. Ponty;J. Laval;B. Dubrulle;F. Daviaud;J. Pinton

文献摘要

被引文献

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我们报告直接数值模拟发电机产生的流量使用泰勒-格林强迫。我们发现该分支是次临界的,并给出了分支图。我们连接相关的滞后行为与流体力学的变化引起的洛伦兹力的作用。我们展示了发电机磁场的几何形状,并讨论了如何发电机过渡时,可以诱导外部场施加到流。
We report direct numerical simulations of dynamo generation for flow generated using a Taylor-Green forcing. We find that the bifurcation is subcritical and show its bifurcation diagram. We connect the associated hysteretic behavior with hydrodynamics changes induced by the action of the Lorentz force. We show the geometry of the dynamo magnetic field and discuss how the dynamo transition can be induced when an external field is applied to the flow.