Hi Toni, The problem you report seems to be related to the AMR, which is a separate module from Llama. There have been multiple updates to the AMR infrastructure since 2017.
-Zach * * * Zachariah Etienne Assistant Professor of Mathematics West Virginia University *https://math.wvu.edu/~zetienne/ <https://math.wvu.edu/~zetienne/>* https://blackholesathome.net On Wed, Mar 6, 2019 at 1:42 PM Antoni Ramos Buades < [email protected]> wrote: > Hi, > > we are using a version of the EinsteinToolkit of 2017, particularly, > > !DEFINE ET_RELEASE = ET_2017_06 > > so it is not one of the newest versions, but as far as I know in the last > releases there has not been updates on the Llama thorn. Although we can try > to run with older or newer versions if you think it can help to solve the > problem. > > Best Regards, > Toni. > > > El mié., 6 mar. 2019 a las 18:29, Zach Etienne (<[email protected]>) > escribió: > >> Hi Antoni, >> >> This is a worrisome finding, thanks for sharing. It would be useful if >> you would let us know what version of the ET you are using. Further, if you >> could attempt the simulation with earlier versions of the ET (e.g., the >> first version with Llama included), it would help to determine if this >> issue arose due to some recent commit. >> >> -Zach >> >> * * * >> Zachariah Etienne >> Assistant Professor of Mathematics >> West Virginia University >> *https://math.wvu.edu/~zetienne/ <https://math.wvu.edu/~zetienne/>* >> https://blackholesathome.net >> >> >> On Wed, Mar 6, 2019 at 9:40 AM Antoni Ramos Buades < >> [email protected]> wrote: >> >>> Hi, >>> >>> my name is Antoni Ramos Buades, I am PhD student in the University of >>> the Balearic Islands working with Sascha Husa. We have been using ET with >>> the Llama thorn to produce waveforms. We have observed in some simulations >>> strange behaviors in the waveforms. For example, I have attached a plot of >>> the amplitude of the psi4 of a non-spinning q1 simulation, for different >>> higher order modes, where you can see that the 22, 32 and 44 show weird >>> spikes. We have rerun this simulation outputting 2D data in the x-y plane. >>> We have plotted the Hamiltonian constraint and made a movie (I cannot >>> attach the movie because its size is 42Mb ) but I can attach some snapshots >>> where you can observe that there seems to be an outburst of noise when the >>> boxes are aligned, and this continues happening in the simulation each time >>> the boxes are aligned with each other. Geraint Pratten is also >>> investigating this issue adding some new parameters in the parameter file >>> (attached to the email) for the carpet mesh refinement like >>> freeze_unaligned_parent_levels, freeze_unaligned_levels, ... and running >>> some tests. >>> >>> We would like to ask you if somebidy has ever seen this thing happening >>> before and if somebody knows how one could solve this problem, because with >>> the same Carpet settings we have observed that for some configurations >>> (mass ratio and spins) this does not happen, but for others, like the one >>> presented in this email we do. I have additional quantities as a 2D output >>> like the curvature, metric, horizon, ... in case you think they could be >>> used to check something. >>> >>> Thanks and best regards, >>> Toni. >>> _______________________________________________ >>> Users mailing list >>> [email protected] >>> http://lists.einsteintoolkit.org/mailman/listinfo/users >>> >>
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