We consider the effect of stratification on systematic large-scale flows generated in anelastic convection. We present results from three-dimensional numerical simulations of convection in a rotating plane layer in which the angle between the axis of rotation and gravity is allowed to vary. This model is representative of different latitudes of a spherical body. We consider two distinct parameter regimes: (i) weakly rotating and (ii) rapidly rotating. In each case, we examine the effect of stratification on the flow structure and heat transport properties focusing on the difference between Boussinesq and anelastic convection. Furthermore, we show that regimes (i) and (ii) generate very different large-scale flows and we investigate the role stratification has in modifying these flows. The stratified flows possess a net helicity not present in the Boussinesq cases which we suggest, when combined with the self-generated shear flows, could be important for dynamo action.

中文翻译：

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旋转非弹性对流中剪切流和涡旋的产生

我们考虑了分层对非弹性对流中产生的系统性大尺度流动的影响。我们介绍了旋转平面层中对流的三维数值模拟结果，其中旋转轴和重力之间的角度允许变化。该模型代表球体的不同纬度。我们考虑两个不同的参数体系：（i）弱旋转和（ii）快速旋转。在每种情况下，我们都着眼于Boussinesq与非弹性对流之间的差异，研究了分层对流动结构和传热特性的影响。此外，我们表明，制度（i）和（ii）产生了非常不同的大规模流动，并且我们研究了分层在修改这些流动中的作用。