[FLASH-USERS] delaying particle initiation

[Slavin, Jonathan]

Hi Ryan,

Yes, I see that this addresses the issue of evolving the particles after
they're initiated, though it doesn't address the issue of their
initialization. However I think that it points me in the right direction. I
think what I need to do is write my own Particles_initData.F90 which does
what I want it to.

Regards,
Jon

On Fri, Apr 2, 2021 at 9:18 AM Ryan Farber <rjfarber at umich.edu> wrote:

> Hi Jon,
>
> I would think initializing dust particles some time into the simulation
> would be analogous to modeling star formation.
>
> We have our star particle model called by Particles_advanceModel. And one
> of the first lines of the star particle model subroutine handles star
> particle formation.
>
> So the traceback is:
>
> Driver_evolveFlash
>  -> Particles _advance
>  -> -> Particles_advanceModel
>  -> -> -> Particles_advanceStarParticleModel
>  -> -> -> -> stars_createStars
>
> Hope that helps.
>
> Best,
> --------
> Ryan
>
>
> On Fri, Apr 2, 2021 at 5:49 AM Slavin, Jonathan <jslavin at cfa.harvard.edu>
> wrote:
>
>> Hi all,
>>
>> I'm trying to figure out if there's some way that I can delay particle
>> initiation. Essentially I'm trying to set up the simulation with
>> pre-evolution of the environment but I'm only really interested in the
>> evolution after a certain time. I'm calculating the evolution of dust
>> particles (I've created a dust unit that evolves the position, velocity,
>> and mass of the particles) so I don't want them to evolve prior to the main
>> simulation.
>>
>> It seems that particle initiation occurs at the start of the simulation
>> via calls from Driver_initFlash. I wrote my own pt_initPositions and it
>> works fine to initialize the particles at the beginning of the simulation.
>> I just don't know how to delay that initialization - though I have some
>> ideas for kludgy workarounds. I'd appreciate hearing ideas for the proper
>> way to do this.
>>
>> Thanks,
>> Jon
>>
>> --
>> Jonathan D. Slavin
>> Astrophysicist - High Energy Astrophysics Division
>> Center for Astrophysics | Harvard & Smithsonian
>> Office: (617) 496-7981 | Cell: (781) 363-0035
>> 60 Garden Street | MS 83 | Cambridge, MA 02138
>>
>>
>>

-- 
Jonathan D. Slavin
Astrophysicist - High Energy Astrophysics Division
Center for Astrophysics | Harvard & Smithsonian
Office: (617) 496-7981 | Cell: (781) 363-0035
60 Garden Street | MS 83 | Cambridge, MA 02138
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