Mean Flow Evolution of Saturated Forced Shear Flows in Polytropic Atmospheres

Autor:	Witzke, V., Silvers, L. J.
Rok vydání:	2016
Předmět:	Astrophysics - Solar and Stellar Astrophysics Physics - Fluid Dynamics
Druh dokumentu:	Working Paper
Popis:	In stellar interiors shear flows play an important role in many physical processes. So far helioseismology provides only large-scale measurements, and so the small-scale dynamics remains insufficiently understood. To draw a connection between observations and three-dimensional DNS of shear driven turbulence, we investigate horizontally averaged profiles of the numerically obtained mean state. We focus here on just one of the possible methods that can maintain a shear flow, namely the average relaxation method. We show that although some systems saturate by restoring linear marginal stability this is not a general trend. Finally, we discuss the reason that the results are more complex than expected. Comment: 5 pages, 1 figure, Astrofluid Conference Proceedings
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1611.10131 Zobrazit plný text záznamu View this record from Arxiv