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 .
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