Roberto, OK, thank you. Cheers, Bruno
Il giorno ven 17 gen 2020 alle ore 11:17 Roberto De Pietri < [email protected]> ha scritto: > Dear Bruno: > > We did some weno-z test for dynamical bar-mode instability of > differentially rotating neutron stars. > It reproduced the results of ppm but we did not perform convergence test. > For the moment > We did not test it for BNS systems since the only possible converge test > are for the inspiral phase and > we did not expect any differences there. > > Roberto > > > On 17 Jan 2020, at 10:50, Bruno Giacomazzo <[email protected]> > wrote: > > Roland, > thank you very much for the information. > > My student (Beatrice Giudici, in cc to this email) told me that this is > the same WENO-Z that is used by Bernuzzi in his BAM code ( > https://ui.adsabs.harvard.edu/abs/2016PhRvD..94f4062B/abstract). She is > going to do some tests, starting with the Balsara tests and compare it with > MP5 and WENO. We will then probably move to oscillating TOV and then BNS > (maybe doing some of the tests that Roberto did in his paper with WENO). > > We will keep you posted. I just wanted to check what the status was. I > added Roberto in this discussion because of his work with WENO and GRHydro, > so I was wondering if he had a look also at WENO-Z. > > Thanks, > Bruno > > Il giorno gio 16 gen 2020 alle ore 19:30 Haas, Roland <[email protected]> > ha scritto: > >> Hello Bruno, Roberto, >> >> > I just discovered that GRHydro supports also WENO-Z (a different >> > implementation of the WENO 5th order reconstruction scheme). >> > >> > I have a master student currently looking at high order schemes and I >> admit >> > that I thought that GRHydro had only WENO5 implemented >> > (recon_method="weno") since this is the scheme that was mentioned and >> > tested in the GRHydro paper (which instead does not mention WENO-Z >> which I >> > assume was probably implemented after the paper). >> > >> > Has the WENO-Z implementation also been tested? Is someone using it? >> It has been years since this was really tested (it was first implemented >> in December 2012 / January 2013). I believe Christian Reisswig and I have >> to take blame for implementing any bugs in it. >> >> I am no longer quite sure if how much testing was done. I looked through >> old emails but cannot tell from them whether only WENO (plus changes from >> Sasha Tchekhovskoy's WHAM paper: https://arxiv.org/abs/0704.2608) which >> were described in the GRHydro MHD paper (Moesta, Mundim et al.) were tested >> or also the WENO-z implementation. >> >> Worse, I do not even have a reference from the flavor of WENO-z that was >> implemented :-(. Could be >> https://www.sciencedirect.com/science/article/pii/S0021999107005232 >> Borges et al. JCompPhys Volume 227, Issue 6, 1 March 2008, Pages 3191-3211 >> or something completely different. >> >> So, while I believe that there was effort to test it, there is no longer >> a reproducible way to check what was tested and how well it performed. >> >> Yours, >> Roland >> >> -- >> My email is as private as my paper mail. I therefore support encrypting >> and signing email messages. Get my PGP key from http://pgp.mit.edu . >> > > > -- > > Prof. Bruno Giacomazzo > Department of Physics > University of Milano-Bicocca > Piazza della Scienza 3 > 20126 Milano > Italy > > email: [email protected] > phone: (+39) 02 6448 2321 > web: http://www.brunogiacomazzo.org > > ---------------------------------------------------------------------- > There are only 10 types of people in the world: > Those who understand binary, and those who don't > ---------------------------------------------------------------------- > > > -- Prof. Bruno Giacomazzo Department of Physics University of Milano-Bicocca Piazza della Scienza 3 20126 Milano Italy email: [email protected] phone: (+39) 02 6448 2321 web: http://www.brunogiacomazzo.org ---------------------------------------------------------------------- There are only 10 types of people in the world: Those who understand binary, and those who don't ----------------------------------------------------------------------
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