[FLASH-USERS] boundary conditions changing with time

[Marissa Adams]

Also: I am not entirely sure if you'll fine
*Simulation_bcApplyToRegionSpecialized.F90* in the problem module
directories, but it is definitely somewhere grep-able in the code.

On Mon, Nov 20, 2017 at 5:02 PM, Marissa Adams <madams at pas.rochester.edu>
wrote:

> Hey Julia,
>
> I would suggest in* /source/Simulation/SimulationMain/*
>
> grep -ri "Grid_bcApplyToRegionSpecialized.F90" .
>
>
> Copy this file into your problem module. Perhaps also read a bit about how
> boundary conditions work in the user manual (for instance there is some
> nuance with "face==LOW" versus "face==HIGH" and what that implies for
> your *flash.par* file). In your *flash.par* file set your particular
> boundary condition you're changing with "user," e.g. "xr_boundary_type =
> "outflow"" to "xr_boundary_type="user"". Depending on where you'd like
> your jet to enter, (in the above .F90 file) you can then edit the
> particular "case(USER_DEFINED)" to your liking (you can search for this
> in the file, but it is ~300 lines; not too long). I would then suggest
> adding a subroutine to the file, or a function to define your jet in the
> file at the bottom, or some simple calculations before "applied =.true."
> (say, some file I/O if you have a profile made for your energy deposition)
> but after the variable declarations.
>
> Since you want this to change with time, and you're doing a comparison
> with the simulation time, you'll also want to look for the file *Simulation_adjustEvolution.F90
> *and copy the pertinent definitions for simulation time there, "stime".
> That may also be another file you'd want to consider using for this
> problem, but I think bcApplyToRegionSpecialized is the way to go.
>
> Best,
> Marissa
>
>
> On Mon, Nov 20, 2017 at 4:46 PM, Julia Grott <julia.grotova at gmail.com>
> wrote:
>
>> Hello everybody,
>> I'm a starting flash user, and I wonder if I can make boundary conditions
>> that will change with time.
>> To be more precise I'm trying to model a jet ( an outflow of matter)
>> which will turn on and off at certain moments of time. (Something like: if
>> t< 5 sec, then turn on jet, else turn off. )
>> How can I do something like a timer?
>> Maybe I don't need to vary boundary conditions, but just to add proper
>> conditions in the Simulation_initBlock, which can be  turned off after
>> certain time.
>>
>> I will be happy to hear any ideas,
>> Thanks in advance!
>>
>> Julia
>>
>>
>>
>>
>
>
> --
> Marissa Adams                                 E-mail: madams at pas.
> rochester.edu
> PhD Student                                   Ph: (585) 402-5779
> University of Rochester                       Website: http://www.pas.
> rochester.edu/~madams/
> Department of Physics & Astronomy
> 371 Bausch & Lomb Hall
> P.O. Box 270171
>



-- 
Marissa Adams                                 E-mail:
madams at pas.rochester.edu
PhD Student                                   Ph: (585) 402-5779
University of Rochester                       Website:
http://www.pas.rochester.edu/~madams/
Department of Physics & Astronomy
371 Bausch & Lomb Hall
P.O. Box 270171
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