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Foundation ::
Thermal Tools ::
TAP
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TAP
Thermal Analyzer Program
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SOURCE CODE AVAILABLE
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TAP (Thermal Analyzer Program) solves N-dimensional transient heat transfer problems by the analysis of an analogous network of nodes joined by conductors. A capacitance, C, a heat generation rate, Q, and a temperature, T, are associated with each node. A conductance, K, is associated with each conductor.
The object under study is divided into convenient volumes, called nodes. Each node is assigned an identification number. The conductors represent resistance to heat transfer by the various heat flow paths; i.e., conduction, convection, and radiation. The temperatures at all nodes are computed at successive time intervals.
The network parameters, K and C, may be either constant or functions of temperature and/or time. The heat generation, Q, may also be a function of temperature and/or time. If variable, K, C, and Q are evaluated at the beginning of each time interval. In addition, the temperature, T, may be specified at any node as a function of time.
The conductors may represent conduction, convection, or radiation paths.
Convection and radiation are evaluated at the beginning of each time interval. Conduction, if variable, may be made a function of the average temperature of the two connecting nodes. Such conduction is evaluated at the beginning of each time interval.
The program is unable to handle pure steady-state problems; however, any node may be made a steady-state node (so long as it is not connected to any other steady-state node) by assigning to its capacitance the value zero. Temperatures computed for linked zero-capacitance nodes can be in error.
TAP carries the NASA case number MFS-18410. It was originally released as part of the COSMIC program.
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