论文标题
旋转异弹对对流的剪切流和涡旋产生
Generation of shear flows and vortices in rotating anelastic convection
论文作者
论文摘要
我们考虑分层对无弹对对流产生的系统大规模流的影响。我们介绍了在旋转平面层中对流的三维数值模拟的结果，在旋转平面层中，旋转轴和重力之间的角度可以变化。该模型代表了球体的不同纬度。我们考虑了两个不同的参数状态：（i）弱旋转和（ii）迅速旋转。在每种情况下，我们都会检查分层对集中在Boussinesq和Anlastic对流之间差异的流动结构和热传输特性的影响。此外，我们表明制度（i）和（ii）产生非常不同的大规模流，我们研究了分层在修改这些流中的作用。分层流具有在BousSinesQ病例中不存在的净螺旋性，我们建议，当与自我生成的剪切流相结合时，对于发电机的作用可能很重要。
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 focussing 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.
