Mean flow generation in rotating anelastic two-dimensional convection
Physics of Fluids
American Institute of Physics (AIP)
Copyright (2016) AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.
We investigate the processes that lead to the generation of mean flows in two-dimensional anelastic convection. The simple model consists of a plane layer that is rotating about an axis inclined to gravity. The results are twofold: first, we numerically investigate the onset of convection in three-dimensions, paying particular attention to the role of stratification and highlight a curious symmetry. Second, we investigate the mechanisms that drive both zonal and meridional flows in two dimensions. We find that, in general, non-trivial Reynolds stresses can lead to systematic flows and, using statistical measures, we quantify the role of stratification in modifying the coherence of these flows.
Science and Technology Facilities Council (STFC)
This article appeared in Physics of Fluids Vol. 28, 017101 (2016) and may be found at: http://dx.doi.org/10.1063/1.4939300
Vol. 28, 017101 (2016)