[ET Trac] #2549: inlcude FLRWSolver in ET

[Zach Etienne]

#2549: inlcude FLRWSolver in ET

 Reporter: Roland Haas
   Status: new
Milestone: ET_2022_05
  Version: development version
     Type: enhancement
 Priority: major
Component: 

Comment (by Zach Etienne):

I’ll add comments as I have time.

First off, initial data thorns should depend on \*Base thorns, and not any particular evolution thorn. I’m referring to 

```
shares:GRHydro

USES real rho_abs_min
USES real rho_rel_min
USES REAL initial_rho_abs_min
USES REAL initial_rho_rel_min
USES REAL initial_atmosphere_factor
USES real GRHydro_rho_central
```

within `param.ccl` . It should be the initial data thorn’s responsibility to set up the atmosphere and set parameters accordingly. For me, the solver wouldn’t even get to the compile stage because I generally comment out `GRHydro` from my `ThornList` \(naturally I use `IllinoisGRMHD`\).

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2549/inlcude-flrwsolver-in-et
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