User: bmundim Date: 2011/01/24 11:40 AM
Modified: / ET.tex
Log: thorn --> module
File Changes:
Directory: / ============
File [modified]: ET.tex Delta lines: +11 -11 =================================================================== --- ET.tex 2011-01-24 17:32:44 UTC (rev 14) +++ ET.tex 2011-01-24 17:40:13 UTC (rev 15) @@ -400,16 +400,16 @@ \subsection{Initial Data} \todo{1/2 page Josh, Bruno}
-The Einstein Toolkit contains many thorns used to generate initial data for GR simulations, -including both vacuum and hydrodynamical configurations. These include thorns used primarily +The Einstein Toolkit contains many modules used to generate initial data for GR simulations, +including both vacuum and hydrodynamical configurations. These include modules used primarily for testing out various components of the evolution scheme as well as physically motivated -configurations that describe single of binary blacks and/or neutron stars. Many of the thorns +configurations that describe single of binary blacks and/or neutron stars. Many of the modules are self-contained, consisting of either all the code to generate exact initial solutions or the numerical tools required to construct solutions known semi-analytically. Others, though, require the installation of other numerical software packages that are included in the toolkit -as External libraries. The {\tt twopunctures} thorn \cite{Ansorg:2004ds}, commonly used in numerical +as External libraries. The {\tt twopunctures} module \cite{Ansorg:2004ds}, commonly used in numerical relativity to generate binary black hole data, invokes the GNU Scientific Library [GSL; \cite{Galassi:2009}]. -Several thorns have also been implemented to read in datafiles generated by the +Several modules have also been implemented to read in datafiles generated by the {\tt Lorene code} \cite{Loreneweb,GGTMB}, including the BHBH, BHNS, and NSNS data made publicly available through the Lorene website.
@@ -420,10 +420,10 @@ in question represents vacuum or a hydrodynamical configuration. Finally, any necessary cleanup is typically performed at the end of the initial step, prior to the iterations forward in time.
-For vacuum initial data configurations, an initial data thorn must supply $g_{ij}$, the spatial 3-metric, +For vacuum initial data configurations, an initial data module must supply $g_{ij}$, the spatial 3-metric, and $K_{ij}$, the extrinsic curvature. While the evolution scheme typically makes use of the BSSN formalism, the conversion between the physical and conformal metric and extrinsic curvature is handled solely within -evolution thorns, and is not referenced by initial data ones. Optionally, many initial data thorns also +evolution modules, and is not referenced by initial data ones. Optionally, many initial data modules also supply values for the lapse and shift vector, and in some cases time derivatives as well, though these may be supplied by other routines depending on the freedom to choose gauge conditions envisioned for a specific configuration. @@ -450,13 +450,13 @@ \end{enumerate} \item Black Hole configurations: \begin{enumerate} -\item {\tt IDAnalyticBH}: This thorn can generate Schwarzchild black holes, as well as the Misner solution +\item {\tt IDAnalyticBH}: This module can generate Schwarzchild black holes, as well as the Misner solution for multiple BHs and the brill-Lindquist binary BH solution. -\item {\tt IDAxibrillBH,~IDAxiOddBrillBH}: These thorns generate single black holes deformed by even and +\item {\tt IDAxibrillBH,~IDAxiOddBrillBH}: These modules generate single black holes deformed by even and odd parity axisymmetric perturbations, respectively. -\item {\tt DistortedBHIVP,~RotatingDBHIVP}: These thorns generate single black holes distorted by even +\item {\tt DistortedBHIVP,~RotatingDBHIVP}: These modules generate single black holes distorted by even and odd-parity non-axisymmetric perturbation, respectivey. -\item {\tt TwoPunctures}: This thorn generates accurate binary black-hole initial data. +\item {\tt TwoPunctures}: This module generates accurate binary black-hole initial data. \end{enumerate} \end{itemize}