[Users] Black hole data for EHFinder

Roland Haas rhaas at illinois.edu
Fri Jan 20 13:23:41 CST 2017

Hello Maitraya, Eloisa,

there is actually documentation inside of EHFinder itself, eg:


and a pdf version is available via the 

make sim-ThornGuide



> Dear Eloisa,
> My ultimate goal is to look at more general data, hence I want to start
> knowing how to use EHFinder.
> Any type of black hole simulation data and instructions on how to run
> EHFinder is highly appreciated.
> Maitraya.
> On Jan 21, 2017 00:15, "Eloisa Bentivegna" <eloisa.bentivegna at ct.infn.it>
> wrote:
> On 20/01/17 10:25, Maitraya Bhattacharyya wrote:
> > Dear all,
> >
> > I would like to know how to use the EHFinder. Can anyone help me as to
> > how to use this ?
> >
> > Also, if you have some simple data, like a Schwarzschild or Kerr black
> > hole, can you please share.
> >
> > I have some data from other simulation packages (which are spread over a
> > uniform grid). My goal would be to eventually run the EHFinder on that.  
> Dear Maitraya,
> since you have a spherically-symmetric spacetime, your problem is much
> simpler than what EHFinder was designed for, and in my opinion it isn't
> worth the effort of turning your data into 3+1 and importing it in Cactus.
> My suggestion is that you take a look, e.g., at section 7.2 of this book:
> https://books.google.it/books?id=dxU1OEinvRUC
> You'll see than in spherical symmetry the problem greatly simplifies,
> and can be solved with a few lines of code.
> I hope this helps,
> Eloisa
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