User: diener Date: 2012/04/05 04:09 PM

Modified: /et-tour/ et_tour.tex

Log: More slides for tour of ET.

File Changes:

Directory: /et-tour/ ====================

File [modified]: et_tour.tex Delta lines: +129 -5 =================================================================== --- et-tour/et_tour.tex 2012-04-05 20:14:36 UTC (rev 84) +++ et-tour/et_tour.tex 2012-04-05 21:09:35 UTC (rev 85) @@ -15,10 +15,10 @@ \item Support Tools. \item Computational Infrastructure. \item EinsteinBase. - \item Spacetime evolution. - \item Spacetime analysis. - \item Matter evolution. - \item Matter analysis. + \item EinsteinInitial. + \item EinsteinEvolve + \item Einsteinanalysis. + \item Miscellaneous. \end{itemize} }

@@ -147,13 +147,137 @@ \item TmunuBase (basic stress-energy variables). \item EOS_Base (EOS registration). \item EOSG_Base (interface to generic EOS'). + \item Constants (Provides $c$, $G$ and $M_{\odot}$ in various units). \item CoordGauge (not used by many thorns anymore). \item ADMCoupling (not used by many thorns anymore). \item ADMMacros (Macros for calculating various quantities based on the ADM variables). - \item Constants (Provides $c$, $G$ and $M_{\odot}$ in various units). \item StaticConformal (variables for a static conformal factor; not used anymore). \end{itemize} } + +\frame{\frametitle{ADMBase} +ADMBase is the glue that holds the Einstein Toolkit together. It serves 3 main +functions. +\begin{enumerate} + \item It defines groups of grid functions for the basic variables: + metric (gxx, gxy, gxz, gyy, gyz, gzz), + extrinsic curvature (kxx, kxy, kxz, kyy, kyz, kzz), + lapse (alp), shift (betax, betay, betaz), + time derivative of the lapse (dtalp) and time derivative of the + shift (dtbetax, dtbetay, dtbetaz) along with their symmetry information. + \item Defines basic parameters to choose the initial data, evolution + method and number of active timelevels that other thorns can use or + extend where appropriate. Ensures that only one initial data or + evolution method can be chosen at a time. + \item Defines a schedule group for other thorns to schedule their + routines modifying the ADMBase variables. Used correctly, + ensures that the ADMBase variables gets modified at the right time in + the Cactus schedule so they are available when needed by other thorns. +\end{enumerate} +Also contains routines for Minkowski initial data and `static' evolutions. +} + +\frame{\frametitle{HydroBase} +Provides the basic variables for matter evolution. +\begin{itemize} + \item {\tt rho}: rest mass density $\rho$ + \item {\tt press}: pressure $P$ + \item {\tt eps}: Specific internal energy $\epsilon$ + \item {\tt vel[3]}: contravariant fluid three velocity $v^i$ + \item {\tt w_lorentz}: Lorentz factor $\gamma$ + \item {\tt Y_e}: electron fraction $Y_e$ + \item {\tt temperature}: temperature $T$ + \item {\tt entropy}: specific entropy per particle $s$ + \item {\tt Bvec[3]}: contravariant magnetic field vector $B^i$ +\end{itemize} +Also sets up scheduling groups for recommended interaction with the fluid variables. +} + +\frame{\frametitle{TmunuBase} +Defines the grid functions for the stress-energy tensor. +\begin{itemize} + \item The time component $T_{00}$: {\tt eTtt} + \item The mixed components $T_{0i}$: {\tt eTtx}, {\tt eTty}, {\tt eTtz} + \item The spatial components $T_{ij}$: {\tt eTxx}, {\tt eTxy}, {\tt eTxz}, + {\tt eTyy}, {\tt eTyz}, {\tt eTzz} +\end{itemize} +Also sets up scheduling groups for other thorns to schedule routines that adds +to the stress-energy tensor. +} + +\frame{\frametitle{EinsteinInitial} +Many kinds of initial data are available in the Einstein Toolkit +\begin{description} + \item[TwoPunctures] Puncture binary black hole initial data. + \item[Meudon_Bin_BH] Meudon binary black hole initial data. + \item[Noexcision] Turduckening. + \item[Exact] A bunch of exact solutions to the Einstein equations. + \item[TOVSolver] Single TOV star. + \item[Meudon_Bin_NS] Meudon binary neutron star initial data. + \item[Meudon_Mag_NS] Meudon binary magnetized neutron star initial data. + \item[GRHydro_InitData] Test initial data for hydro evolutions. + \item[Other] Many other less used (i.e.\ old and less accurate) initial + data thorns. +\end{description} +More are welcome. +} + +\frame{\frametitle{EinsteinEvolve} +The EinsteinToolkit provides McLachlan for spacetime evolution and GRHydro +for GRMHD matter evolution. + +The codes are designed to interoperate through the ADMBase and TmunuBase +interface. + +For black hole simulations we have PunctureTracker that allow us to track the +black holes and move the refined grids accordingly. + +You have been working on a similar thorn for neutron star simulations during +the hands on session at this workshop. + +NewRad is a radiative boundary condition thorn and LegoExcision provides +excision (not used very often anymore). +} + +\frame{\frametitle{EinsteinAnalysis} +Several thorns in the Einstein Toolkit can be used to analyze numerical +spacetimes +\begin{description} + \item[AHFinderDirect] Find black hole apparent horizons quickly. + \item[AHfinder] Find black hole apparent horizons slowly. + \item[QuasiLocalMeasures] Calculate spins of surfaces with spherical topology. + \item[WeylScal4] Calculate the Newman-Penrose scalar $\Psi_4$. + \item[Multipole] Decompose arbitrary grid functions into spin-weighted + spherical harmonics. + \item[Extract] Perform Regge-Wheeler-Zerilli 1st order gauge invariant + gravitational wave extraction. + \item[PITTNullCode] Cauchy extraction of gravitational waves. + \item[ADMAnalysis] Calculate several quantitites from the ADM variables. + \item[EHFinder] Find event horizons in numerical spacetimes. + \item[ADMConstraints] Calculate the ADM constraints from the ADM variables. + \item[Hydro_Analysis] Calculate various quantities related to the + density maximum of matter evolutions. +\end{description} +} + +\frame{\frametitle{Miscellaneous} +\begin{description} + \item[HTTPD] A thorn that turns your simulation into a web server. + \item[Cartoon2D] A thorn that allows you to perform 2D simulations with a 3D + code. + \item[Dissipation] A thorn that allows you to add Kreiss-Oliger dissipation + to any evolved variable. + \item[Formaline] A thorn that stores the complete source tree in the + executable. + \item[NaNChecker] A thorn that checks for NaN's. + \item[TerminationTrigger] A thorn that triggers checkpointing and + termination. + \item[TimerReport] A thorn that reports the time spent in scheduled routines. + \item[SphericalSurface] A thorn that stores surfaces of spherical topology. + \item[SummationByParts] A thorn that provides summation by parts finite + difference operators and compatible dissipation operators. +\end{description} +} \end{document}