[FLASH-USERS] VisIt with many AMR levels

Tomasz Plewa tplewa at fsu.edu
Thu May 7 13:41:50 EDT 2009


Yes, it is. With 31 levels of refinement you still have a few digits of 
precision left, so it might be different from what we see.

Tomek
--
Sean Couch wrote:
> Hi Tomek,
>
> I am plotting from checkpoint files.  In checkpoint files, aren't the 
> spatial data saved in double-precision?
>
> Sean
>
> On May 7, 2009, at 11:33 AM, Tomasz Plewa wrote:
>
>> I believe I mentioned this problem recently.
>>
>> This is for checkpoint files or plotfiles?
>>
>> Tomek
>> -- 
>> Sean Couch wrote:
>>> Hello everyone,
>>>
>>> I am using VisIt to visualize FLASH 2.5 data with 31 levels of 
>>> refinement in 2D.  It seems this many levels is breaking VisIt (I am 
>>> using VisIt 1.11.1).  The plots are reminiscent of the 
>>> 'over-lapping' block levels problem of the past; whole sections are 
>>> single-valued, the high-level detail is absent, etc.  This plot 
>>> pattern will change if I re-open the data file or change which 
>>> levels VisIt is plotting.  I have reduced the number of AMR levels 
>>> in some runs and find that VisIt can handle up to around 20, but 31 
>>> seems too much...
>>>
>>> Has anyone used VisIt with a large number of AMR levels?  Any ideas 
>>> as to what's going on, and more importantly, how to fix it?
>>>
>>> Cheers,
>>> Sean
>>>
>>>
>>> ---------------------------------------------
>>> Sean M. Couch
>>> PhD Candidate
>>> Department of Astronomy
>>> The University of Texas at Austin
>>> 1 University Station C1400
>>> RLM 17.312
>>> (512) 471-7418
>>> smc at astro.as.utexas.edu
>>> www.as.utexas.edu/~smc
>>>
>> <tplewa.vcf>
>
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