[FLASH-USERS] problems with refinement in FLASH3.1

[Tomasz Plewa]

Seyit, Latif, and All -

It is not advisable to place f-c (refinement) boundaries in regions of 
strong gradients. If we do, things will very likely go badly.

As a rule of thumb, we would like to have a dozen of zones per scale 
height implying perhaps no more than 10% jumps in critical variables 
(density, pressure, velocity).

Tomek
-- 
Seyit Hocuk wrote:
> Hi,
>
> I have the same thing when using refinement. At the border between 
> different refinement levels. Similar fluctuation like the parent cells.
>
> Seyit
>
>
>
>
> Latif wrote:
>> Hi
>> Dear All,
>> I am using  inradius  refinement criteria. I am adding two static 
>> levels of refinement using  inradius criteria. i do see some weird 
>> values along the boundary of refinement. I am  sending images which 
>> will elaborate the effect i am mentioning.
>> 2nd thing is if don't add inradius criteria from beginning of 
>> simulation and add them after few files, dt hydro becomes  low as 
>> temperature shoots up. some thing goes wrong with adding static 
>> refinement levels.  Everything goes fine if use uniform refinement 
>> criteria.
>> 3rd thing that i have noticed is, if i use threshold refinement 
>> criteria with inradius criteria, it starts refining although actual 
>> threshold value is not yet reached. I think, it might be refining due 
>> to wierd values along boundary of inradius criteria.
>> Cheers
>> Latif
>>
>> ------------------------------------------------------------------------
>>
>>
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>>
>
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