论文标题
部分可观测时空混沌系统的无模型预测
Effect of electromagnetic boundary conditions on the onset of small-scale dynamos driven by convection
论文作者
论文摘要
我们介绍了一项高阶数值研究，该研究是在对流的温度梯度强制强迫的Boussinesq流动时，发作对不同电磁边界条件的依赖性。使用一种方法将磁场和边界条件以接近光谱的精度处理，考虑了完美传导边界，真空和混合电磁边界条件。具有一两个传导边界极大地有助于发电机动作。对于混合情况，表明临界磁性雷诺数与足够大的RA无关。
We present a high-order numerical study of the dependence of the dynamo onset on different electromagnetic boundary conditions, in convecting Boussinesq flows forced by a temperature gradient. Perfectly conducting boundaries, vacuum, and mixed electromagnetic boundary conditions are considered, using a method that treats fields and boundary conditions with close to spectral accuracy. Having one or two conducting boundaries greatly facilitates dynamo action. For the mixed case it is shown that the critical magnetic Reynolds number becomes independent of the Rayleigh number, Ra, for sufficiently large Ra.
