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Radiative Heat Transfer  Heat transfer by radiation   Thermal
Elements   The Radiative Heat Transfer block represents a heat
transfer by radiation between two bodies. The transfer is
governed by the Stefan-Boltzmann law and is described with the
following equation:   QHeat flow kRadiation coefficient
AEmitting body surface area TA, TBTemperatures of the bodies
The radiation coefficient is determined by geometrical shapes,
dimensions, and surface emissivity. For example, the radiation
constant for the heat transfer between two parallel plates is
computed as   σStefan-Boltzmann constant ε1, ε2Surface
emissivity for the emitting and receiving plate, respectively
Similarly, the radiation coefficient for concentric cylinders is
determined with the formula  where r1 and r 2 are the emitting
and receiving cylinder radii, respectively. Reference [1]
contains formulas for a wide variety of shapes.  Connections A
and B are thermal conserving ports associat