I tried to follow the link but the whole framework (ETK + Cactus + Loni an so on...) is so scattered and so poorly documented that it discouraged me. I have the idea that only those who already use Cactus intensively will know how to use the toolkit.
The Einstein Toolkit Consortium is developing and supporting open software for relativistic astrophysics
this is a core product, that you can attach modules to for specific models that you want to run. able to handle GR on a cosmological scale !
http://einsteintoolkit.org/
I tried to follow the link but the whole framework (ETK + Cactus + Loni an so on...) is so scattered and so poorly documented that it discouraged me.
I have the idea that only those who already use Cactus intensively will know how to use the toolkit.