[mesa-users] Solberg-Hoiland stability

[David Arnett]

J.-T. Schindler and I are planning to visit Kavli in November (the week
before Thanksgiving) to work with Bill to implement a new option for
convection in MESA: 321D (Arnett, et al., ApJ, 2015). Because 321D uses an
acceleration equation, it automatically determines  boundaries (that is,
where velocity is negligible). It is based on 3D simulations of turbulent
convection and fluid experiments.

We crawl before we walk, so the first version ignores rotation, but it
seems obvious how to start to generalize to rotating systems. For slow
rotation, something like the shellular approximation of Maeder and Meynet
is valid.

We welcome collaborators in this effort. Anyone interested?
Dave

ps. All the usual stability criteria (e.g., Schwarzschild, Ledoux,
Richardson, Solberg-Hoiland,  etc.), as well as boundary physics
(overshoot, semiconvection, wave generation, etc.) are contained in the
general formulation of 321D simply because acceleration is what gives
motion.

-- 
David Arnett
Regents Professor
Steward Observatory
University of Arizona

Facts are stubborn, but statistics are more pliable.  Mark Twain
Facts do not cease to exist because they are ignored.  Aldous Huxley
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