On 24 Jan 2017, at 12:02, Maitraya Bhattacharyya <[email protected]>
wrote:
> Hi all,
>
>
> Does anyone know how the data is formatted into HDF5 files as outputted by
> CactusPUGHIO. I specifically want to know how the lapse, shift and spatial
> metric are stored in a unigrid inside the hdf5 files.
>
> Any example file would be most welcome.
>
> It's just that I am trying to format some data into a format which is
> recognized by EHFinder.
Hi,
The format of files produced by CactusPUGHIO is in the CactusPUGHIO
documentation. You can find the documentation about each thorn in the ET at
https://einsteintoolkit.org/documentation/ThornDoc/
If you scroll down to the CactusPUGHIO arrangement, you will find the thorn
IOHDF5
(https://einsteintoolkit.org/documentation/ThornDoc/CactusPUGHIO/IOHDF5/) which
is the thorn that does the output of HDF5 files from PUGH. Section 7 is
entitled "Importing External Data Into Cactus With IOHDF5", and the format of
the HDF5 file that you need is described there. There is also a
"well-documented example C program" referred to from this documentation
(Cactus/arrangements/CactusPUGHIO/IOHDF5/doc/CreateIOHDF5datafile.c) which
creates such a file.
The data itself should be a 3d dataset in Cartesian coordinates. This means
that if your metric is expressed in spherical coordinates, you will need to do
a basis transformation to get gxx etc from grr etc.
--
Ian Hinder
http://members.aei.mpg.de/ianhin
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