mesa-users] Semiconvection, thermohaline mixing
paxton at kitp.ucsb.edu
Sat Oct 30 15:58:44 EDT 2010
On Oct 30, 2010, at 12:19 PM, alfred at gautschy.ch wrote:
> Whom it might concern, or who might help
> Going through the whole star_defaults.dek file trying to figure out
> where I can modify parameters, I realized that apparently MESA treats
> semiconvection and thermohaline mixing; this is great! However, as
> these mechanisms have various recipes on how to treat them I expected
> that at some point in star_defaults.dek one or the other parameter
> related to the treatment of semiconvection and/or thermohaline mixing
> would show up; I could not find anything though. Is this right? Is
> there no user interference possible for semiconvection and
> thermohaline mixing? How to find out what approach was adopted in MESA?
Semiconvection + thermohaline mixing were in for a time but currently are not.
But they have top priority to be (re)implemented -- so I expect to have something soon.
> I think what was said above applies also to some degree to diffusion
> of species, also apparently implemented in MESA.
We have element diffusion that works fine in non-degenerate environments
(such as solar interior). The section star_defaults.dek is up-to-date (I hope!).
> Is there a philosophy being followed in the MESA development on how
> "hard-wired" code parts (i.e. no modifications through namelists
> possible) in say numerics, microphysics, macrophysics are documented
> and/or made accessible to the common user?
I intend to make all the lower-level functionality available at the mesa/star
level via inlist controls. So please let me know if you discover something
that I've missed.
More information about the Mesa-users