Penetration of a cooling convective layer into a stably-stratified composition gradient: Entrainment at low Prandtl number

@article{Fuentes2020PenetrationOA,
  title={Penetration of a cooling convective layer into a stably-stratified composition gradient: Entrainment at low Prandtl number},
  author={J. Rodrigo Fuentes and Andrew Cumming},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2020}
}
We study the formation and evolution of a convective layer when a stably-stratified fluid with a composition gradient is cooled from above. We perform a series of 2D simulations using the Bousinessq approximation with Prandtl number ranging from Pr = 0.1 to 7, extending previous work on salty water to low Pr. We show that the evolution of the convection zone is well-described by an entrainment prescription in which a fixed fraction of the kinetic energy of convective motions is used to mix… Expand
Shear flows and their suppression at large aspect ratio: Two-dimensional simulations of a growing convection zone
We investigate the onset and evolution of zonal flows in a growing convective layer when a stably-stratified fluid with a composition gradient is cooled from above. This configuration allows theExpand

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