Roland,

EinsteinExact does contain both Gauge Wave shifted gauge wave initial data. They're provided as additional thorns. Here's the relevant part of my thorn list:

!TARGET = $ARR !TYPE = git !URL = https://github.com/barrywardell/EinsteinExact.git !REPO_PATH= $2 !CHECKOUT = EinsteinExact/doc EinsteinExact/m EinsteinExact/tests EinsteinExact/EinsteinExact_Test EinsteinExact/GaugeWave EinsteinExact/KerrSchild EinsteinExact/Minkowski EinsteinExact/ModifiedSchwarzschildBL EinsteinExact/ShiftedGaugeWave EinsteinExact/Vaidya2

Here's the parameter file I used to run it (in compliance with apples with apples) for my DG paper (arXiv:1604.00075):

https://bitbucket.org/Yurlungur/oldg-supplemental/src/12834adfa6ce4b0660ca98...

I was using my implementation Mclachlan, but you should be able to adapt the relevant parameters.

Best,

Jonah

On 17-07-20 02:13 PM, Roland Haas wrote:

Hello all,

I am trying to set up the gauge wave test from the apples with apples paper https://arxiv.org/abs/0709.3559 "Appendix A.3. Gauge wave testbed". While these are simple enough the coding up the ADM variables is not a big deal, I would still ideally avoid this potential source of error and use a code that is already in the ET or Cactus.

Does anyone know if such a thorn exists in the ET (and would point me to it)? EinsteinExact does not seem to contain such a module (but only the shifted gauge test).

Yours, Roland

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