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Diffstat (limited to 'doc/documentation.tex')
| -rw-r--r-- | doc/documentation.tex | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/doc/documentation.tex b/doc/documentation.tex index 59a7721..f820382 100644 --- a/doc/documentation.tex +++ b/doc/documentation.tex @@ -22,17 +22,17 @@ ds^2 = \Psi^4 \left[ e^{2q} \left( d\rho^2 + dz^2 \right) \label{eqn:brillmetric} \end{equation} where $q$ is a free function subject to certain regularity and -fall-off conditions and $Psi$ is a conformal factor to be solved for. +fall-off conditions and $\Psi$ is a conformal factor to be solved for. The thorn considers several different forms of the function $q$ depending on certain parameters that will be described below. Substituting the metric above into the Hamiltonian constraint results -in an elliptic equation for the conformal factor $Psi$ that can be +in an elliptic equation for the conformal factor $\Psi$ that can be solved numerically once the function $q$ has been specified. The initial data is also assumed to be time-symmetric, so the momentum constraints are trivially satisfied. -The thorn is activated by choosing the standard Cactus parameter +The thorn is activated by choosing the CactusEinstein/ADMBase parameter ``initial\_data'' in one of the following two ways: \begin{itemize} @@ -110,17 +110,10 @@ q \rightarrow q \left[ 1 + d \frac{\rho^m}{1 + e \rho^m} \item brill\_srho (REAL): $\sigma_\rho$ in above expressions (default 1.0). - -\item savepsi (KEYWORD): Save conformal factor for output? - [``yes'',''no''] Normally, the conformal factor is calculated in the - grid function ``psi'', but this is set back to 1 at the end once the - physical metric has been constructed. Setting this parameter to - ``yes'' copies the conformal factor to the grid function - ``brillpsi0'' before resetting it to 1 (default ``no''). - + \end{itemize} -The elliptic solver is controlled by additional the parameters: +The elliptic solver is controlled by the additional parameters: \begin{itemize} |