[mesa-users] timestep controls

[Pablo Marchant]

And if you wish, you can also set s% dt_next in extras_finish step without
retrying, so it works like the non-hard timestep limits

(also untested)

if( abs( 10**s%xtra1_old - 10**s%log_R) > EPS) then
    s% dt_next = min(s% dt_next, s%dt * SOME_SCALE_FACTOR)
end if

On Mon, May 9, 2016 at 7:14 PM, Robert Farmer <rjfarmer at asu.edu> wrote:

> Hi Kenny
>
> if there is not an option you can always make your  own in
> run_stars_extra.f
>
> (Untested)
>
> In extras_startup:
> s%xtra1=0.d0
>
> extras_finish_step:
> s%xtra1=s%log_R
>
> extras_check_model:
>
> if( abs( 10**s%xtra1_old - 10**s%log_R) > EPS) then
>     extras_check_model = retry
>     s% dt = s%dt * SOME_SCALE_FACTOR
> end if
>
> This will save the stars previous radius in s%xtra1 which in the next
> timestep, becomes extra1_old, you can then compare it to the current radius
> and if some condition is false force a retry with a new timestep.
>
> Rob
>
>
>
> On Mon, May 9, 2016 at 9:01 AM, Kenny Van <kvan at ualberta.ca> wrote:
>
>> Hi,
>>
>> I was looking through the timestep controls and I noticed that while
>> there was a parameter for looking at the change in mass of the star:
>> 'delta_lg_star_mass_limit'. There is no equivalent for radius of the star.
>> The closest I could find to that is the max change in any cell radius
>> using: 'delta_lgR_limit'. I was wondering if there was any way to have a
>> radius equivalent to 'delta_lg_star_mass_limit'?
>>
>> Thanks
>>
>>
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>
>
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> Manager
> Applications Manager provides deep performance insights into multiple
> tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
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-- 
Pablo Marchant Campos
M.Sc on Astrophysics, Universidad Católica de Chile
PhD student, Argelander-Institut für Astronomie
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