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| -rw-r--r-- | doc/documentation.tex | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/doc/documentation.tex b/doc/documentation.tex index 518f231..1411419 100644 --- a/doc/documentation.tex +++ b/doc/documentation.tex @@ -18,8 +18,8 @@ a wave speed. Thorn {\tt Time} uses one of four methods to decide on the timestep to be used for the simulation. The method is chosen using the -keyword parameter {\tt time::timestep\_method}. (Note: In releases Beta 8 and -earlier the parameter used was {\tt time::courant\_method} +keyword parameter {\tt time::timestep\_method}. + \begin{itemize} \item{} {\tt time::timestep\_method = ``given''} The timestep is fixed to the @@ -68,8 +68,31 @@ $$ \Delta t \le \mbox{min}(\Delta x^i)/\mbox{wave speed}/\sqrt(\mbox{dim}) $$ +\section{Examples} + +{\bf Fixed Value Timestep} + +{\tt +\begin{verbatim} +time::timestep_method = ``given'' +time::timestep = 0.1 +\end{verbatim} +} + + +{\bf Calculate Static Timestep Based on Grid Spacings} +The following parameters set the timestep to be 0.25 +{\tt +\begin{verbatim} +grid::dx = 0.5 +grid::dy = 1.0 +grid::dz = 1.0 +time::timestep_method = ``courant_static'' +time::dtfac = 0.5 +\end{verbatim} +} % Automatically created from the ccl files by using gmake thorndoc \include{interface} |