Generation of shear flows and vortices in rotating anelastic convection. (arXiv:2001.07953v1 [physics.flu-dyn])
<a href="http://arxiv.org/find/physics/1/au:+Currie_L/0/1/0/all/0/1">Laura K. Currie</a>, <a href="http://arxiv.org/find/physics/1/au:+Tobias_S/0/1/0/all/0/1">Steven M. Tobias</a>
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.
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.
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