The differential equation describing the temperature pro file in the carbon zone of a charring ablator was simulated on an IBM 7040 digital computer using MIMIC, a digital- analog simulator language. This differential equation de scribes a nonlinear, two-point boundary value problem, thus requiring an iterative procedure to converge to a solu tion. In order to handle the iterative procedure, the logical- control-variable feature of MIMIC was especially useful.
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