[Users] Wv reconstruction issue for PPM+Poly EoS

[Hee Il Kim]

Hi Roland,

Yes, the routines of PPM for "poly" are highly suspicious. I can't make
comparisons for the different numbers but the star didn't rotate very fast.
The evolution pattern (e.g. rho.max) was different, resulting in a black
hole with an wrong mass, contrary to the case with the velocity
reconstruction. I'm sorry I can't continue the test at the moment but
MP5+Ideal EOS was also good without showing any difference.

Yours,

Hee Il

2014-12-05 16:23 GMT+09:00 Roland Haas <roland.haas at physics.gatech.edu>:

> Hello Hee Il,
>
> > Even though it may not be popularly used, Wv-reconstruction for
> > PPM+Polytropic EoS doesn't seem to work properly. It gives significantly
> > different result compared to the one with velocity reconstruction. I have
> > seen at least the followings are fine;
> >
> > 2nd order ENO + Poly EoS (cf. crashed with 3rd order ENO)
> > PPM + Ideal Fluid EoS
> > 5th order WENO + Ideal Fluid EoS (cf. No poly EoS supports in WENO)
> >
> > The tests have been done with Herschel and partly with Noether.
> Just to be very sure: you see these issues only when using polytropic
> EOS, ie Ideal_Fluid EOS is fine? I am asking because for some of the
> routines there are two copies, a Ideal_Fluid one and a 2D_Polytrope one
> and only the later would contain the possible bug if you only see it for
> polytropes. Note that reconstruct_Wv does (by design) give different
> answers than the direct velocity reconstruction, in particular when the
> velocities are high. Are the "different" numbers you see "obviously wrong"?
>
> Yours,
> Roland
>
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