[mesa-users] Teff fluctuation

[Bill Paxton]

Hi Masanobu,

You've set max_years_for_timestep = 1d8 in your inlist.
The example_solar test case sets max_years_for_timestep = 1d7.

Here's what I get with the inlist you sent and then after changing to the smaller max timestep.

max_years_for_timestep = 1d8
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max_years_for_timestep = 1d7
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Cheers,
Bill



 



On Oct 10, 2014, at 11:01 PM, Masanobu Kunitomo wrote:

> Dear all,
> 
> In the solar-mass star calculation in version 6596, I found that Teff is fluctuating after ZAMS. The amplitude is about 100K, so it is not negligible. 
> 
> My settings are:
> ---------------------------------
> -no rotation
> -create PMS model
> -no mass loss/gain
> -MLT: Henyey
> -atm: photosphere_tables
> -varcontrol_target = 1d-4
> ---------------------------------
> For more details, please check the attached inlist file.
> 
> I have not seen this fluctuation in the previous calculation under the similar settings with version 4798. And even in ver. 6596, when the diffusion was off, the fluctuation disappeared. 
> 
> My question is: Was the calculation of diffusion changed? Is there another reason for the fluctuation?
> 
> 
> I apologise if it is a result of an old version. I appreciate any hints.
> Thanks in advance!
> 
> 
> Best reagards,
> Masanobu
> 
> 
> 
> <inlist_solar>
> 
> <PastedGraphic-2.pdf>
> 
> 
> 
> 
> 
> 
> --
> Masanobu Kunitomo
> Ph.D. student / JSPS Research Fellow
> Tokyo Institute of Technology
> Dept. of Earth and Planetary Sciences
> Email: kunitomo at geo.titech.ac.jp
> 
> 
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