Diffusion Nodes
A diffusion node is used to represent normal materials. Diffusion nodes have the rmal mass (capacitance) and store and release energy with time. This process is characterized by a gain or loss of potential energy which depends on the capacit ance value, the net heat flow, and the time over which the heat is flowing. In t he transient solution routine, diffusion node temperatures are calculated by a f inite difference representation of the partial differential heat transfer equation. Three items are stored for each diffusion node: temperature, thermal capacitance, and nodal heating (if any).
117, 10.000, 1.00 $ Hot MIC 220, 10.000, 1.00 $ Forward Baffle 260, 10.000, 1.00 $ Secondary MirrorThe node number, initial temperature, and thermal capacitance are entered on one line. As in all data block, an in-line comment can be inserted after a "$". Al l the thermal capaciatance in this model are set to a 1.00 (dummy value). During a steady state solution, the thermal capacitance is not used. All temperatures are set to 10.0 Kelvin as an initial guess(you don't have to be close).
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