Nicholas
Are you writing your thorn via Kranc, or are you writing it in C/C++/Fortran?
There is a schedule group "AddToTmunu". You should schedule a routine there that modifies (adds to) the Tmunu variables, as there might be several sources of stress-energy. Particular to Kranc, you will need to (a) determine how to access the Tmumu variables, and (b) set up the correct scheduling to ensure that the routine is called at the right time.
If you are looking for details then we can schedule a Zoom call to discuss.
-erik
On Mon, Feb 7, 2022 at 12:50 PM Nick Olsen n.olsen.3.711@gmail.com wrote:
Hello everyone
I have been trying to write a thorn to couple the Klein-Gordon equations to the 3+1 Einstein equations. I can't figure out the details on how to make the thorn tell the ET how to update T_munu according to the evolution equations. I've been trying to write the thorn with Kranc without much luck, as Kranc isn't telling me anything when it does fail. I have attached the .m of the attempted thorn here. If anyone has any input or suggestions it would be greatly appreciated.
Nicholas Olsen _______________________________________________ Users mailing list Users@einsteintoolkit.org http://lists.einsteintoolkit.org/mailman/listinfo/users