[santacruzgalaxy-list] Fwd: new Grackle APIs available

[Yves Revaz]

Dear all Grackle users,

For those of you who wants to use the new grackle wrapper designed to 
interface with C,
I've found a tiny bug.

In the file grackle_wrapper.cxx, we need to specify the velocity units 
in the structure my_units:

   velocity_units = my_units.a_units * my_units.length_units 
/my_units.time_units;
*  my_units.velocity_units = velocity_units;*

Including the previous change and setting:

   my_chemistry.with_radiative_cooling = 0;
   my_chemistry.primordial_chemistry = 0;

and un-commenting:
   a_value = auni / my_units.a_units;

The interface works fine for me.

Cheers,

yves




On 08/13/2014 07:12 PM, Ji-hoon Kim wrote:
> Dear AGORA members,
>
> I am forwarding the recent updates from the Grackle group (attached 
> below).  This might interest many of you who want to include the 
> Grackle chemistry and cooling library in your code, for AGORA 
> simulations or not.
>
> Sincerely,
> Ji-hoon
>
>
>
>
>
> Begin forwarded message:
>
>> *From: *Britton Smith <brittonsmith at gmail.com 
>> <mailto:brittonsmith at gmail.com>>
>> *Subject: **new Grackle APIs available*
>> *Date: *August 13, 2014 at 2:52:56 AM PDT
>> *To: *"grackle-cooling-users at googlegroups.com 
>> <mailto:grackle-cooling-users at googlegroups.com>" 
>> <grackle-cooling-users at googlegroups.com 
>> <mailto:grackle-cooling-users at googlegroups.com>>
>>
>> Hi everyone,
>>
>> I wanted to make everyone aware of some recent developments with the 
>> Grackle.  Recently, the main user-facing Grackle functions were 
>> rewritten to be pure C instead of C++.  This has made it much simpler 
>> to create interfaces for simulation codes written in C and Fortran. 
>>  In fact, a number of new working examples have been added displaying 
>> C and Fortran interfaces.  All of these new efforts have been put 
>> into an open pull request which can be viewed here:
>> https://bitbucket.org/grackle/grackle/pull-request/2/wip-moving-chemistry_data-structure-into/diff
>>
>> Feedback on this PR would be most welcome.  A set of functions has 
>> been added that allows the users to initialize and call Grackle 
>> functions without ever having to deal with the chemistry data and 
>> units structs.  It would be particularly useful to get feedback on those.
>>
>> This also means that the original API from version 1.0 has changed. 
>>  Because of this, I think that once this PR is accepted and 
>> documentation has been fixed up, a 2.0 release is probably a good 
>> idea.  Anyway, comments on the PR or anything I've laid out here is 
>> definitely encouraged.
>>
>> Also, as a reminder, the official Grackle repo is now located at
>> https://bitbucket.org/grackle/grackle
>> so make sure to fork that and not the old one.
>>
>> Britton
>>
>> -- 
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>
> -------------------------------------------------------------------------
> Ji-hoon Kim
> Postdoctoral Scholar in Astrophysics at Caltech
> www.jihoonkim.org <http://www.jihoonkim.org>
> me at jihoonkim.org <mailto:me at jihoonkim.org> / 1(650)714-2879
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-- 

---------------------------------------------------------------------
   Dr. Yves Revaz
   Laboratory of Astrophysics
   Ecole Polytechnique Fédérale de Lausanne (EPFL)
   Observatoire de Sauverny     Tel : +41 22 379 24 28
   51. Ch. des Maillettes       Fax : +41 22 379 22 05
   1290 Sauverny             e-mail : Yves.Revaz at epfl.ch
   SWITZERLAND                  Web : http://people.epfl.ch/yves.revaz
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