Thanks for the quick responses Erik and Miguel
To answer Erik's question, I intended to use Kranc as a simpler way to write the thorn and if the roadblocks didn't stop I was going to switch to manually writing the thorn using one of the hydrodynamic thorns as a skeleton framework to learn how to write a thorn for coupled equations, which is roughly where I was today if Kranc wasn't an easy fix. I will have to get back to you on your offer after I read through what Miguel has linked here thoroughly, but thank you for the offer.
Miguel, I believe I will need some time to take an in depth look at this before I can be sure that this is what I have been looking for, but I suspect it is exactly what I need, so thank you very much for this.
Nicholas Olsen
On Mon, Feb 7, 2022 at 1:51 PM Miguel Zilhão mzilhao@ua.pt wrote:
hi Nick,
i can't really help you out with Kranc, but we have a freely available thorn that does precisely the Einstein-Klein-Gordon system. you can find it here as part of the Canuda library: https://bitbucket.org/canuda/scalar/src/master/ i hope it helps.
cheers, Miguel
On 07/02/2022 17:50, Nick Olsen 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
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