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\subsection{The \moc{/BIHET/} sub-directory}\label{sect:bihettrackingdir}
\vskip -0.3cm
\begin{DescriptionEnregistrement}{The contents of the
\moc{/BIHET/} sub-directory}{8.0cm}
\IntEnr
{PARAM\blank{7}}{$8$}
{Record containing the parameters related to a double-heterogeneity tracking
$\mathcal{P}_{i}$}
\IntEnr
{NS\blank{10}}{$\mathcal{P}_{4}$}
{Number of tubes or shells in each kind of micro structure}
\IntEnr
{IBI\blank{9}}{$\mathcal{P}_{3}$}
{Type of mixture in each generating region of the macro geometry}
\RealEnr
{VOLUME\blank{6}}{$\mathcal{P}_{3}$}{cm$^3$~~~}
{Volumes of the macro geometry}
\RealEnr
{RS\blank{10}}{$\mathcal{P}_{5}+1,\mathcal{P}_{4}$}{cm}
{Radii of the micro regions}
\RealEnr
{FRACT\blank{7}}{$\mathcal{P}_{4},\mathcal{P}_{2}$}{}
{Volume fraction of each type of micro region in each mixture}
\RealEnr
{VOLK\blank{8}}{$\mathcal{P}_{4},\mathcal{P}_{5}$}{}
{Volume fractions of the tubes or shells in the micro regions}
\IntEnr
{IDIL\blank{8}}{$\mathcal{P}_{2}-\mathcal{P}_{1}$}
{Elementary mixture indices in the diluent of the composite mixtures}
\IntEnr
{MIXGR\blank{7}}{$\mathcal{P}_{5},\mathcal{P}_{4},\mathcal{P}_{2}-\mathcal{P}_{1}$}
{Elementary mixture indices in the micro structures}
\end{DescriptionEnregistrement}
\noindent
with the dimension parameter $\mathcal{P}_{i}$, representing:
\begin{itemize}
\item The number of ordinary mixtures pointing to the macrolib. $\mathcal{P}_{1}$
\item The number of mixtures, including the composite mixtures (i.e., containing micro structures)
$\mathcal{P}_{2}$
\item The number of regions in the macro geometry $\mathcal{P}_{3}$
\item The number of different kinds of macro structures $\mathcal{P}_{4}=\mathcal{S}^{dh}_{1}$
A kind of macro structure is characterized by the radii of its tubes or shells. All the micro region of the same kind should own
the same nuclear properties in a given macro region.
\item The maximum number of regions (tubes or shells) in each kind of macro structure
$\mathcal{P}_{5}=\mathcal{S}^{dh}_{2}-1$
\item The type of double-heterogeneity model $\mathcal{P}_{6}$
\noindent where
\begin{displaymath}
\mathcal{P}_{6} = \left\{
\begin{array}{rl}
1 & \textrm{Sanchez-Pomraning model} \\
2 & \textrm{Hebert model} \\
3 & \textrm{She-Liu-Shi model} \\
\end{array} \right.
\end{displaymath}
\item The type of micro structures $\mathcal{P}_{7}=\mathcal{S}^{dh}_{5}$
\noindent where
\begin{displaymath}
\mathcal{P}_{7} = \left\{
\begin{array}{rl}
3 & \textrm{Cylinder} \\
4 & \textrm{Sphere} \\
\end{array} \right.
\end{displaymath}
\item The quadrature parameter for the 1-D collision probability calculation in the micro structures
$\mathcal{P}_{8}$
\end{itemize}
\eject
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