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ASC GRAstro_Hydro Arrangement
- Mahc_Analysis
GRA status : non-approved
Mark Miller
Analysis routines for MAHC.
Mahc_Analysis contains various routines for computing
analysis variables in MAHC, such as the local speed of
sound of the fluid, the quantity beta^2/alp^2, the
total (conserved) rest mass of the system, and others.
- Mahc_Boundary
GRA status : approved
Mark Miller
Boundary conditions used in MAHC.
Mahc_Boundary contains boundary conditions used
not only in MAHC, but also in spacetime thorns it is
coupled to, such as conf_adm. Included are several versions
of robin boundary condtions, outgoing wave boundary
conditions, and even a condtion that is equivelant to
robin boundary condtions used in BAM_Elliptic.
- Mahc_Evolve
GRA status : approved
Mark Miller
HRSC discretization of relativistic fluid coupled to a dynamic spacetime.
Mahc_Evolve contains a numerical solver that employs
a High Resolution Shock Capturing method to
solve the relativistic perfect fluid equations.
The default method is Roe's method with arithmetic
averaging. See Phys. Rev. D 61, 044011 (2000) for
information on code tests.
- Mahc_Init_Data
GRA status : approved
Mark Miller
Various initial data sets for GR-Hydro equations.
Mahc_Init_Data contains various initial data sets
relevant to a GR-Hydro code, including shocktubes,
TOV stars, and boosted TOV stars. Some initial
data sets (multiple boosted tov stars) must be used
in conjuction with, e.g. IVP (see GRAstro_SpaceTime)
in order to satisfy the initial value constraints of
general relativity.
- Newtonian_HRSC
GRA status : non-approved
Philip Gressman, Lap Ming Lin
HRSC discretization of Newtonian fluid coupled to Newtonian gravity.
Newtonian_HRSC is a numerical solver which uses
High Resolution Shock Capturing methods to solve
the Euler equations of fluid flow with Newtonian
gravity (for a live gravitational potential, a
separate elliptic equation solver must be used to
solve the Poisson equation). The method used
is Roe's method with geometric averaging. Many
different flux limiters are available for use.
- Quasi_Equil
GRA status : non-approved
Mark Miller
Produces intial data corresponding to quasiequilibrium neutron stars in binary orbit.
Quasi_Equil computes initial data satisfying the initial
value constraints of general relativity corresponding
to quasiequilibrium neutron stars in binary corotating
orbit. Several assumptions, such as conformally flat,
Tr(K) = 0, and ideal fluid EOS have been assumed.
- Resid_Quasi_Equil
GRA status : non-approved
Mark Miller
An independent residual evaluator for the equations solved in thorn Quasi_Equil.
Resid_Quasi_Equil computes independent residuals of all
equations solved in Quasi_Equil (see Quasi_Equil in
GRAstro_Hydro). The form of the equations computed here
are the general (covariant) form of the equations
solved in Quasi_Equil.
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