% Verbal description for system HeatedRod (HeatedRod_desc.tex)
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The acausal bond graph of system \textbf{HeatedRod} is
displayed in Figure \Ref{HeatedRod_abg} and its label
file is listed in Section \Ref{sec:HeatedRod_lbl}.
The subsystems are listed in Section \Ref{sec:HeatedRod_sub}.
System \textbf{HeatedRod} is a model of a rod of copper with an
electric current passing through it which warms it up. The two ends of
the rod are fixed at ambient temperature; this is where all the heat
loss occurs.
This system introduces the idea of the {\bf ES} component which
transforms a relative-temperature/enthalpy pseudo bond (at the [e]
port) into an absolute-temperature/enntropy energy bond (at the [s]
port) and vice versa.
The model is similar to that described in chapter 8 of
Cellier's book. However, instead of representing the thermal
resistance by {\bf RS} components and reinserting the entropy flow,
the {\bf RT} component uses two {\bf ES} components to convert from
true to pseudo bonds and back again. Similary, the thermal capacity is
modelled by the {\bf CT} component.
The rod parameters are given in the numpar file and the input current
in the input file.