[FLASH-USERS] Unsupported boundary condititions

[John ZuHone]

Hi Josef,

Sorry... want to make sure I understand precisely what you're doing....

Is this a cosmological box simulation in which clusters form, and  
which you're also incorporating cosmological expansion? Or is this a  
simulation of an isolated cluster? In the latter case you not only  
want multigrid and "grav_boundary_type" set to "isolated", but you  
also want to make sure that you're including the unit Grid/GridSolvers/ 
IsoBndMultipole.

If this is still not helpful, if you could send along your flash.par,  
and the files setup_call and setup_units in your object directory,  
that might provide more information.

Best,

John Z

On May 7, 2008, at 9:22 AM, Josef Stöckl wrote:

> Hi John,
>
> Actually I did have grav_boundary_type set to "periodic" in my  
> tries, but it doesn't seem like it changed anything.
>
> The problem I'm trying to set up is a cosmological cluster  
> simulation, where it is usually best to have "in/outflow" boundaries  
> set (depending on the code) to prevent some unwanted effects in the  
> hydrodynamics and particles.
>
> Thanks and best regards,
> Josef
>
> John ZuHone wrote:
>> Josef,
>>
>> Following up on Anshu's recommendation, if you are using the  
>> multigrid solver the boundary condition you probably want to use is  
>> "isolated" (I'm guessing at what kind of problem you're trying to  
>> run, if you could specify that information that would also be  
>> helpful). This is what you need to set the "grav_boundary_type"  
>> parameter to in your flash.par. Other parameters, "xl_boundary",  
>> "xr_boundary", etc, should be set to outflow.
>>
>> Best,
>>
>> John
>>
>> For hydrodynamics and/or particles, the bou
>> On May 7, 2008, at 8:04 AM, Josef Stöckl 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
>>> <josef_stoeckl.vcf>
>>
>>
>
> <josef_stoeckl.vcf>