[FLASH-USERS] questions about boundary conditions

[Ryan Farber]

Hi Guido,

I'm not sure how periodic boundary conditions work, but to respond to your
last paragraph on static boundary conditions:
you can set xl_boundary_type (etc.) in flash.par to "user" and
you can modify Grid_bcApplyToRegionSpecialized.F90 "case(USER_DEFINED)" to
set variables to a constant value.

Best,
--------
Ryan


On Tue, Oct 29, 2019 at 11:59 AM guido <g.granda at irya.unam.mx> wrote:

> Hi Flash users,
>
> I've been trying to find out how boundary cells properties are filled
> when periodic boundary conditions are used. Do you know if these cells'
> properties like
>
> magnetic field, velocity, etc, are filled when periodic boundary
> conditions are used. Let's say our initial condition has uniform
> magnetic field or uniform density,
>
> does boundary cells have the same value of these properties or these are
> set to zero or sth else ?
>
> Could you please give me a hint of how to set static boundary conditions
> for a simulation, e.g. a constant magnetic field at the computational
> volume boundary edges.
>
> Cheers,
>
>
>
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