[FLASH-USERS] Unsupported boundary condititions

[Josef Stöckl]

Hi,

As a follow up question: Is there any specific reason that the Multigrid 
solver doesn't handle "outflow" boundaries (e.g. is it intended) or 
could it be implemented?

Thanks and best regards,
Josef

Josef Stöckl wrote:
> Hi Anshu,
>
> Yes, I'm indeed using the Multigrid solver. I didn't find any mention 
> of this solver not working with "outflow", but I'll have to check 
> again. I wonder though, isn't "grav_boundary_type" the boundary 
> condition used for the self gravity? Because I had set that to 
> "periodic" for my initial tests.
>
> Thanks and best regards,
> Josef
>
>
> Anshu Dubey wrote:
>> It appears that you are using the multigrid solver for gravity in 
>> your simulation.
>> Self gravity in FLASH does not support outflow boundary conditions, 
>> most of the
>> other solvers do. From the setups included with the distribution you 
>> can check out
>> "Sod" and "Sedov", they both use outflow boundary conditions.
>>
>> Anshu
>>
>> On Wed, May 7, 2008 at 7:04 AM, Josef Stöckl 
>> <josef.stoeckl at uibk.ac.at <mailto:josef.stoeckl at uibk.ac.at>> wrote:
>>
>>     Hi,
>>
>>     I'm trying to set up a problem with "outflow" boundary
>>     conditions, but when I choose this BC type I always get the
>>     following message in my log:
>>     gr_hgMapBcType: An unexpected gr_hgBndConditions was requested
>>     for the WORK array
>>
>>     Looking inside that file seems to suggest that at the moment only
>>     a few boundary conditions are implemented and not all, which the
>>     Flash 3 Manual lists. Is there some development version of the
>>     Grid code available that handles outflow conditions?
>>
>>     Thanks in advance and best regards to all,
>>
>>     Josef
>>
>>
>

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