[Carpet] CarpetRegrid2: is it possible to activate new levels (PMR)?

[Erik Schnetter]

On Dec 10, 2007, at 09:42:08, Peter Diener wrote:

> Hi Bruno,
>
> As far as I know, this functionality has been moved from a  
> parameter to
> a grid scalar.

This is correct.  Steering parameters can lead to problems with  
checkpoint and restart, since a steerable parameter will be set from  
the parameter file upon restart (if it is set there), not from the  
value stored in the checkpoint file.  This can lead to surprises.

-erik

> In CarpetRegrid2's interface.ccl you'll find the definition of a  
> public
> grid scalar:
>
> CCTK_INT num_levels[10] TYPE=scalar
> {
>    num_levels
> } "Number of refinement levels"
>
> That you can modify. Of course you'll have to set the new region's
> position and radius as well by setting the corresponding grid scalars.
>
> Cheers,
>
>    Peter
>
> On Mon, 10 Dec 2007, Christian D. Ott wrote:
>
>>
>> Hi Bruno,
>>
>> On Mon, Dec 10, 2007 at 03:25:21PM +0100, Bruno Giacomazzo wrote:
>>>  	I'm using the experimental version of Carpet and I would like to
>>> know if CarpetRegrid2 can add new levels during the evolution.
>>> CarpetRegrid had this function through the use of
>>> activate_levels_on_regrid, but I was not able to find something  
>>> similar in
>>> CarpetRegrid2.
>>>
>>>  	Actually I have seen that the parameter num_levels_* is
>>> STEERABLE=always. Has anybody tried to change it during evolution?
>>
>> I don't know the answer to your question, yet I do know that you can
>> continue using CarpetRegrid with carpet-experimental. Personally, I
>> find it more convenient to stick with CarpetRegrid as I am used to  
>> it.
>> Any particular reason you need CarpetRegrid2 to do PMR?
>>
>> - Christian
>>
>> _______________________________________________
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>> developers at lists.carpetcode.org
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>>
>>
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>


-- 
Erik Schnetter <schnetter at cct.lsu.edu>

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