| Infrastructure |
|
ADMBase
|
Defines core variables, parameters, and schedule groups for
the 3+1 formalism.
|
| SpaceMask |
Mask describing the type of a grid point (inside an excision
boundary, on an excision boundary etc). |
| ADMCoupling |
The "friend of a friend" thorn
to help matter / spacetime coupling. Does nothing
itself.
|
| ADMMacros |
Provides macros defining standard quantities (such as
inverse metric, Christoffel symbols) |
| StaticConformal |
Provides the variables defining a static conformal factor
which is used to transform the physical metric. |
| CoordGauge |
Base thorn providing infrastructure for dynamic gauge selection |
| |
|
| Initial Data |
| IDAnalyticBH |
Calculates analytic initial data for the Einstein grid functions
(lapse, shift, metric, curv) for various black hole spacetimes (including Schwarzschild, Misner, Brill-Lindquist) |
| IDAxiBrillBH |
Calculates initial data for a black hole distorted by an
even parity perturbation |
| IDBrillData |
Sets up initial data for a Brill wave |
| IDLinearWaves |
Analytic data for linear gravitational waves (plane and Teukolsky) |
| IDSimple |
Simple initial data sets for 3-metric and extrinsic curvature |
| |
|
| Evolution |
| ADM |
Evolves the standard 3+1 variables using the ADM evolution equations using a variety of possible gauge conditions and numerical methods |
| EvolSimple |
Simplistic evolver for the ADM equations, demonstrating the use of
the CactusEinstein arrangement |
| |
|
| Analysis |
| ADMAnalysis |
basic analysis of the metric and extrinsic curvature
tensors (including trK, det(g), spherical components, R_ab, and R) |
| ADMConstraints |
calculates the violation in the ADM constraints using
the standard Einstein variables |
| AHFinder |
Find apparent horizons |
| Extract |
Calculates gauge invariant waveforms for a nearly spherical symmetric system. Also calculates other quantitites on a 2-surface such as the ADM mass, momentums, and spins. |
| PsiKadelia |
Calculates invariants (Psi's, I and J) with
respect to a given tetrad |
| TimeGeodesic |
Integrates timelike geodesics on the fly in either a numerical or exact spacetime |
| |
|
| Gauge Conditions |
| CoordGauge |
Base thorn providing infrastructure for dynamic gauge selection |
| Maximal |
Sets up the maximal slicing equation, which
can then be solved with SOR or BAM elliptic solvers (note that
BAM doesn't use all the standard interfaces) |
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