Thank you Ian Hinder. Yes I want to add a low density fluid to a BBH simulation.
I review the source code of GRHydro_InitialData Thorn's GRHydro_OnlyAtmo.F90 . I found it give any position ( I mean every nx,ny,nz) a rho value which is a constant equal to "rho_abs_min" or "initial_rho_abs_min". so I think it can give a low density fluid to a BBH simulation. But it report "NAN" or "Con2Prim: count > GRHydro_countmax". Thank again. Yours Zhi-Chao. 2017-08-18 21:54 GMT+08:00 Ian Hinder <ian.hin...@aei.mpg.de>: > > On 17 Aug 2017, at 09:57, 赵志超 <yanyuechui...@gmail.com> wrote: > > Hello everyone, > > I am studying how to use Einstein_toolkit, I want to try to add atmosphere > to a BBH evolution. > I add the below things to BBHLowRes.par in the par dir. > However, it reports "nan" error soon after the beginning of evolution. > I do not know how to correct it. > Could anyone give me some suggestion? > > > Hi, > > Could you give more details about the physics you are trying to add? > "atmosphere" in this context usually means an artificial low density fluid > in a matter simulation which helps with numerical problems that occur when > the density drops to zero. It doesn't make sense to add it to a BBH > simulation, which is vacuum. > > Do you mean that you want to add a low density fluid to a BBH simulation? > > -- > Ian Hinder > http://members.aei.mpg.de/ianhin > > -- 赵志超 中国科学院高能物理研究所 中国 北京 18401696963 yanyuechui...@gmail.com
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