[FLASH-USERS] Coupling RHD with self-gravity

[María Fernanda Clever Uribe]

You're right. Thank you so much for your help.

Best;


Fernanda Clever

El vie., 6 de jul. de 2018 09:05, María Fernanda Clever Uribe <
clever_fisica at ciencias.unam.mx> escribió:

> You're right. Thank you so much for your help.
>
> Best;
>
>
> Fernanda Clever
>
>
> El vie., 6 de jul. de 2018 08:54, Klaus Weide <klaus at flash.uchicago.edu>
> escribió:
>
>> On Thu, 5 Jul 2018, María Fernanda Clever Uribe wrote:
>>
>> > I'm not sure I can use a periodic boundary condition. Could I use
>> another
>> > solver like tree gravity instead?
>>
>> I don't think so - the Barnes-Hut Tree solver in FLASH has this code
>> (in gr_bhInit.F90):
>>
>>   ! Check if we support the requested grid geometry.
>>   if ((NDIM /= 3) .or. (gr_geometry /= CARTESIAN)) then
>>      call Driver_abortFlash ('[gr_bhInit] ERROR: tree Poisson solver
>> works only in 3D Cartesian geometry')
>>   endif
>>
>> The gravity solvers in FLASH all appear to be for threedimensional
>> physics.  Some may be usable in 1D or 2D, but that is just the
>> dimensionality of the numerical representation - the physics represented
>> is still 3D (with some added assumption of symmetry, e.g., spherical).
>> So you can find a gravity solver for 1D spherical or 2D cylindrical, but
>> not 1D or 2D Cartesian.
>>
>> It isn't quite clear what 2D (physical) gravity is actually supposed to
>> mean. (Try a Web search for "Gravity 2D"...) Just solving a 2D Poisson
>> problem instead of a 3D one isn't quite enough!
>>
>> Klaus
>
>
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