Extended subadiabatic layer in simulations of overshooting convection

August 22, 2017

Using three-dimensional simulations with smoothly varying heat conduction profile we found solutions where a substantial fraction of the lower part of the convection zone is stably stratified according to the Schwarzschild criterion. If these results carry over to the Sun...

Using three-dimensional simulations with smoothly varying heat conduction profile we found solutions where a substantial fraction of the lower part of the convection zone is stably stratified according to the Schwarzschild criterion. If these results carry over to the Sun, roughty 40 per cent of the lower part of the convection zone is stably startified. The existence of such a layer has possibly wide-ranging ramification in the theories of differential rotation and dynamos. Furthermore, a subadiabatic region is a possible solution to the so-called 'convective conundrum' which manifests itself as significantly too high convective velocities in traditional simulations.

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