[FLASH-USERS] how to define boundaries of inflow

[Ernesto Zurbriggen]

Hi Antoine

>>I tried to do so by taking the Grid_applyBCEdge.F90 from the windtunnel
test simulation
>>and added : REQUIRES Grid/GridBoundaryConditions/OneRow in the Config
file in my new simulation directory.
Maybe what you are looking for is the routine
Grid/GridBoundaryConditions/Grid_bcApplyToRegionSpecialized.F90 .
Nothing has to be done to call it.

I implemented similar BCs as yours from there.

To read the README  file is recommended, in particular the end about
"Getting information from a block handle (blockID) in a BC implementation"

Best!
Ernesto.


El mié, 2 dic 2020 a las 9:03, Antoine Gintrand (<antoine.gintrand at gmail.com>)
escribió:

> Dear flash users,
>
> I would like to ask you a question regarding how to set up in a easy way
> some boundaries of inflow for a simulation because I am a little confused
> with the explanations in the user guide regarding adding his own
> boundaries. My initial conditions are two counter propagating homogeneous
> flows (for x< 0 with velocity V1>0 and for x>0 velocity V2<0). When I use
> outflow boundaries conditions for my box the inflows of matter somehow
> oscillates at some point.
>
> So I would like to introduce better and proper condition of boundaries
> than impose the inflows of constant velocity, density pressure, ... during
> the whole simulation.
>
> I tried to do so by taking the Grid_applyBCEdge.F90 from the windtunnel
> test simulation
> and added : REQUIRES Grid/GridBoundaryConditions/OneRow in the Config file
> in my new simulation directory.
>
> But when I modify the file I cannot see that the code is actually using
> this file during the simulation. For example I could not see the prints I
> wrote to see my modifications to the file.
>
> Also, I am not even sure that this is the easiest and most clever way to
> modify the boundaries to
> do what I want.
>
> Thank you so much for any advices or suggestions,
>
> Best regards,
>
> Antoine Gintrand
>


-- 
*Dr. Ernesto Zurbriggen, FAPESP posdoctoral fellow*
*​*



*Email: ernesto.zurbriggen at craam.mackenzie.br
<ernesto.zurbriggen at craam.mackenzie.br>​Phone: +55 11-2114-8783*
*Universidade Presbiteriana Mackenzie, *
*Escola de Engenharia, *
*Centro de Rádio Astronomia e Astrofísica Mackenzie (CRAAM),*
*Rua da Consolação 896, 01302-907, SP, São Paulo, Brasil.*
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