Alpha-effect and alpha-quenching
Alpha-effect and alpha-quenching
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阿尔法效应和阿尔法淬灭
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
L. L. Kichatinov
中科院分区：
文献类型：
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作者：
G. Rüdiger;L. L. Kichatinov
在密度梯度和湍流强度梯度同时涉及的二阶相关近似中，给出了重要但鲜为人知的α-效应的新确定。在这两种方法中都出现了新的结果，如果它们得到数值模拟的证实，这些结果与新的发电机模型的设计有关。在我们的第一种方法中，磁性反反应被忽略，但对旋转速率没有施加限制。密度分层和湍流强度的不均匀性对α-效应的产生有相似的作用。已知的两种贡献的相等性只出现在快速旋转中
New determinations of the important, but poorly known α-effect are presented in the Second-Order Correlation Approximation with both gradients of density and turbulence intensity simultaneously involved. In both of the two approaches new results appear which are - if they are confirmed by numerical simulations - relevant to the design of new dynamo models. In our first approach the magnetic back-reaction is ignored but no restrictions on the rotation rate are imposed. The density stratification as well as the turbulence intensity inhomogeneity contribute with similar power to the production of the α-effect. The known equality of both contributions appears for fast rotation only