Ariadne input/output reference
Principal models
Each material is defined as belonging to one of the following classes.
Input for a material consists of a keyword identifying the principal class,
followed by data identifying the subclass providing the specific model
(for example eos perfect_gas
for an equation of state
of perfect gas type).
The name of each principal class is defined in the class data.
Any element of material is described by a state (e.g. density and energy
for an inert equation of state).
Each class of model below may have a different state;
the states are also described.
Subsidiary models
The models below are invoked by particular principal models when needed.