| Issue |
EAS Publications Series
Volume 63, 2013
New Advances in Stellar Physics: From Microscopic to Macroscopic Processes
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|---|---|---|
| Page(s) | 285 - 295 | |
| Section | Hydrodynamics, Mixing Processes and Transport of Angular Momentum in Stars | |
| DOI | https://doi.org/10.1051/eas/1363032 | |
| Published online | 19 December 2013 | |
G. Alecian, Y. Lebreton, O. Richard and G. Vauclair (eds)
EAS Publications Series, 63 (2013) 285–295
Double-diffusive convection
Department of Applied Mathematics and Statistics, Baskin School of Engineering,University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
Much progress has recently been made in understanding and quantifying vertical mixing induced by double-diffusive instabilities such as fingering convection (usually called thermohaline convection) and oscillatory double-diffusive convection (a process closely related to semiconvection). This was prompted in parts by advances in supercomputing, which allow us to run Direct Numerical Simulations of these processes at parameter values approaching those relevant in stellar interiors, and in parts by recent theoretical developments in oceanography where such instabilities also occur. In this paper I summarize these recent findings, and propose new mixing parametrizations for both processes that can easily be implemented in stellar evolution codes.
© EAS, EDP Sciences, 2013