Testing a one-dimensional prescription of dynamical shear mixing with a two-dimensional hydrodynamic simulation

2017/04/13 by P. V. F. Edelmann, Philipp V. F. Edelmann, Friedrich K. Roepke +7 · 19 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Dynamical friction #Dynamical systems theory #Hydrostatic equilibrium #Mixing (physics) #Shear (geology) #Shear flow #Stellar, planetary, and galactic studies #astro-ph.SR

paper · pdf · doi:10.1051/0004-6361/201629873

published in Astronomy and Astrophysics 604, A25 (EDP Sciences) · 15 pages, 14 figures, accepted for publication by A&A, movie available at https://slh-code.org/papers/dynshear

openalex publication_date 2017/04/13 · arxiv created 2017/04/20 · openalex created_date 2017/04/28 · arxiv updated 2017/08/02 · openalex updated_date 2026/08/05

Abstract

Context. The treatment of mixing processes is still one of the major uncertainties in 1D stellar evolution models. This is mostly due to the need to parametrize and approximate aspects of hydrodynamics in hydrostatic codes. In particular, the effect of hydrodynamic instabilities in rotating stars, for example, dynamical shear instability, evades consistent description.

Citations

• A two-parameter criterion for classifying the explodability of massive stars by the neutrino-driven mechanism
• Turbulent transport in radiative zones of stars
• The Geneva stellar evolution code
• On the stability of heterogeneous shear flows
• Presupernova Evolution of Rotating Massive Stars. II. Evolution of the Surface Properties
• Turbulent Convection in Stellar Interiors. I. Hydrodynamic Simulation
• Efficient implementation of essentially non-oscillatory shock-capturing schemes
• Very low-metallicity massive stars: