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Mean flow evolution of saturated forced shear flows in polytropic atmospheres

Witzke, V. & Silvers, L. J. (2019). Mean flow evolution of saturated forced shear flows in polytropic atmospheres. EAS Publications Series, 82, pp. 259-269. doi: 10.1051/eas/1982026


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 threedimensional 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.

Publication Type: Article
Additional Information: Reproduced with permission from EAS Publications Series, © EDP
Subjects: Q Science > QA Mathematics
Departments: School of Science & Technology > Mathematics
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