[mesa-users] Zero Brunt-Vaisala freq. in outer regions of GYRE output files

[Bill Paxton]

instead of adding an atmosphere, try moving the outer edge of the model to a smaller optical depth by changing tau_factor to something like 1d-4.





On Jun 10, 2014, at 12:40 PM, Richard Townsend wrote:

> Thanks!
> 
> I was hoping that adding an atmosphere would fix that — but from Josiah’s post, it seems it won’t.
> 
> Is there a good reason why the Brunt can’t be calculated in the atmosphere? Since the acoustic cutoff frequency depends on the Brunt, this issue is quite important.
> 
> cheers,
> 
> Rich
> 
> On Jun 10, 2014, at 2:37 PM, Bill Paxton <paxton at kitp.ucsb.edu> wrote:
> 
>> <Convection.pdf>
>> BV zero because there's a tiny convection zone at the surface.
>> 
>> 
>> 
>> 
>> On Jun 10, 2014, at 12:13 PM, Richard Townsend wrote:
>> 
>>> Hi folks —
>>> 
>>> I’ve been calculating a set of massive main-sequence models using MESA r6596 (inlists attached), and saving the models in GYRE format for some post-processing.
>>> 
>>> Looking at these models, it appears that the BV frequency is identically zero in the outer ~40 zones (example attached — see column 9 for N^2). Has anyone else encountered this — and is there a fix?
>>> 
>>> cheers,
>>> 
>>> Rich
>>> 
>>> <profile74.data.GYRE><inlist><inlist_massive><inlist_massive_defaults>
>>> 
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>> 
>