diff options
Diffstat (limited to 'doc/ThornGuide.tex')
-rw-r--r-- | doc/ThornGuide.tex | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/doc/ThornGuide.tex b/doc/ThornGuide.tex deleted file mode 100644 index c03e09b..0000000 --- a/doc/ThornGuide.tex +++ /dev/null @@ -1,132 +0,0 @@ -\documentstyle{report} -\newcommand{\parameter}[1]{{\it #1}} - -\begin{document} - -\chapter{IDAnalyticBH} - -\begin{tabular}{@{}ll} -Code Authors & Joan Masso, Paul Walker, Ed Seidel. Gabrielle Allen \\ -Maintained by & Cactus Developers \\ -Documentation Authors & -\end{tabular} - -\section{Introduction} - -\subsection{Purpose of Thorn} - -Thorn IDAnalyticBH provides analytic initial data for vacuum black -hole spacetimes. Initial data is provided for the 3-metric, extrinsic -curvature, and if appropriate the conformal factor and it's spatial -derivatives. The current initial data sets are for a single (Schwarzschild) -black hole in isotropic coordinates, up to four Brill-Lindquist black -holes, and any number of Misner-type black holes. - -\subsection{Technical Specification} - -\begin{itemize} - -\item{Implements} einsteinID -\item{Inherits from} einstein -\item{Tested with thorns} Einstein - -\end{itemize} - -\section{Theoretical Background} - - -\section{Algorithmic and Implementation Details} - -This thorn uses no special numerical methods, however two points -are worth noting - -\begin{enumerate} - -\item{} The solution for Misner is obtained by summing a sequence - -\item{} The spatial derivatives of the conformal metric (when required) - are calculated accurately using finite differencing of the - exact solution by a very small spacing - -\end{enumerate} - -\section{Using the Thorn} - -This thorn can provide either the physical metric (use\_conformal=''no'') -or the conformal metric and a conformal factor (and its spatial derivatives) -(use\_conformal=''yes''). In general, the option use\_conformal=''yes'' should -be used, since ????. - -\section{Parameters} - -\subsection{Extended Parameters} -\begin{tabular}{l|l|l|l} -&&&\\ -einstein &&&\\ -\hline -\parameter{initial\_data} & KEYWORD & schwarzschild & One Schwarzschild black hole \\ -& & bl\_bh & Brill Lindquist black holes \\ -& & misner\_bh &Misner black holes \\ -& & multiple\_misner\_bh & Multiple Misner black holes \\ -\parameter{initial\_lapse} & KEYWORD & schwarz & Set lapse to schwarzschild \\ -\end{tabular} - -\subsection{Private Parameters} - -\begin{tabular}{l|l|l|l|l} -&&&&\\ -Schwarzschild & & & & \\ -\hline -\parameter{mass} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 2.0 & Mass of black hole \\ -&&&&\\ -Multiple Misner & & & & \\ -\hline -\parameter{mu} & {\t CCTK\_REAL} & $[0,\infty)$ & 1.2 & Misner $\mu$ value \\ -\parameter{nmax} & {\t CCTK\_INT} & $[0,\infty)$ & 30 & Numer of terns to include for Misner series \\ -\parameter{misner\_nmh} & {\t CCTK\_INT} & $[0,10]$ & 1 & Number of Misner black holes \\ -&&&&\\ -Brill Lindquist & & & & \\ -\hline -\parameter{bl\_nbh} & {\t CCTK\_INT} & $[1,4]$ & 1 & Number of Brill Lindquist black holes\\ -\parameter{bl\_x0\_1} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & x-position of first BL hole\\ -\parameter{bl\_y0\_1} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & y-position of first BL hole\\ -\parameter{bl\_z0\_1} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & z-position of first BL hole\\ -\parameter{bl\_M\_1} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 1.0 & mass of first BL hole\\ -\parameter{bl\_x0\_2} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & x-position of second BL hole\\ -\parameter{bl\_y0\_2} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & y-position of second BL hole\\ -\parameter{bl\_z0\_2} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & z-position of second BL hole\\ -\parameter{bl\_M\_2} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 1.0 & mass of second BL hole\\ -\parameter{bl\_x0\_3} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & x-position of third BL hole\\ -\parameter{bl\_y0\_3} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & y-position of third BL hole\\ -\parameter{bl\_z0\_3} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & z-position of third BL hole\\ -\parameter{bl\_M\_3} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 1.0 & mass of third BL hole\\ -\parameter{bl\_x0\_4} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & x-position of fourth BL hole\\ -\parameter{bl\_y0\_4} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & y-position of fourth BL hole\\ -\parameter{bl\_z0\_4} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 0.0 & z-position of fourth BL hole\\ -\parameter{bl\_M\_4} & {\t CCTK\_REAL} & $(-\infty,\infty)$ & 1.0 & mass of fourth BL hole\\ -\end{tabular} - -\subsection{Discussion} - - - -\section{Interaction with Other Thorns} - -It is still to be decided how initial data should be supplied to -for systems of evolution equations which use more or different -variables to those in the einstein implementation - -\section{Future Development} - -Initial data sets which are missing from this thorn include - -\begin{itemize} - -\item{} Boosted single black hole -\item{} Single black hole in harmonic spatial coordinates -\item{} Single black hole in Eddington-Finkelstein coordinates - -\end{itemize} - - -\end{document} |