On 04/03/2018 09:54 PM, Erik Schnetter wrote: > Wolfgang > > I don't think such a thing exists. > > It should be relatively straightforward to calculated the ADM > quantities from the ADM variables. I also think this is how it should > be done; I was surprised to see that it is done differently. After > all, that's why we have the ADM variables -- as lingua franca so that > thorns don't have too many interdependencies. >
Such a thorn would be nice. However, if there is a good reason to directly use the evolved variables in the BSSN system, it would still be nice to add a CCZ4 version for completeness. I guess it should be easy since Z4 and BSSN are fairly similar. > Do you need the ADM integrands everywhere or just on a 2-sphere? If > the latter, then the thorn QuasiLocalMeasures could provide these. > I wanted to have some fun with the actual integrants in 3D. For 2D surface integrals, QLM indeed works just fine for me. @Roland: In the interface.ccl of ML_ADMConstraints I only see the ADM constraints, no expressions for ADM energy and angular momentum. Or did you mean something else? Cheers, Wolfgang. > -erik > > > > On Tue, Apr 3, 2018 at 9:05 AM, Wolfgang Kastaun <[email protected]> wrote: >> Hi, >> >> I just started using the ML_ADMQuantities thorn (because I wanted the >> ADM integrants, not just the integrals), and stumbled on two issues: >> >> 1. It seems this thorn only works with ML_BSSN, is there a version for >> ML_CCZ4 somewhere? >> >> 2. Madm and Jadm3 are declared as tensorweight=0 in the interface.ccl, >> but it seems to me that they already include the square root of the >> 3-metric determinant (at least I got the correct ADM mass by just using >> the standard average reduction operator on them for some test). Should >> that be tensorweight=1 instead? >> >> Cheers, >> Wolfgang. >> >> _______________________________________________ >> Users mailing list >> [email protected] >> http://lists.einsteintoolkit.org/mailman/listinfo/users > > > _______________________________________________ Users mailing list [email protected] http://lists.einsteintoolkit.org/mailman/listinfo/users
