[Carpetx-developers] lapse terms in Whisky's fluxes

[Bruno Giacomazzo]

Ian,
  thanks a lot for your help.

Cheers,
Bruno


Il giorno mer 3 nov 2021 alle ore 16:39 Ian Hawke <I.Hawke at soton.ac.uk> ha
scritto:

> Yes; the "difference" is that the "num_flux" in the two cases are
> different (one will contain the lapse, the other not, as undensitized) [I
> think]. So the implemented case with the explicit averaged lapse at each
> interface should directly approximate the standard form, but effectively
> uses a different reconstruction approach for gauge vs the rest of the flux.
>
> I have memories of trying both approaches when playing with WENO
> reconstruction early on, and it making little difference. There should be
> no problem with scaling by any term that does not explicitly depend on
> terms within the hydro state vector.
> ------------------------------
> *From:* Roland Haas <rhaas at illinois.edu>
> *Sent:* 03 November 2021 15:31
> *To:* Ian Hawke <I.Hawke at soton.ac.uk>
> *Cc:* carpetx-developers at einsteintoolkit.org <
> carpetx-developers at einsteintoolkit.org>
> *Subject:* Re: lapse terms in Whisky's fluxes
>
> CAUTION: This e-mail originated outside the University of Southampton.
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-- 

Prof. Bruno Giacomazzo
Department of Physics
University of Milano-Bicocca
Piazza della Scienza 3
20126 Milano
Italy

email: bruno.giacomazzo at unimib.it
phone: (+39) 02 6448 2321
web: http://www.brunogiacomazzo.org

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