Abstract
Although DIAN can be used for almost any type of simula tion problem, it has been used most where it had a particu lar advantage over other available methods of solution. Thus, it has been used to transfer an analog problem to a digital computer when the problem grew too large for the existing facilities, where a large number of transport delays or where long transport delays were involved, and when the simulation problem was very large.
The DIAN flowsheet is almost the same as an analog computer flowsheet, the coding of the input cards is straightforward, and except for a boundary value problem, no compilation is necessary. Iterative solutions of boundary value problems can be solved using DIAN and several problems can be handled sequentially in a multifile run. The use of DDA-type integrators permits flexibility in non linear function generation and output format may be var ied since the format is supplied as input information with each problem.
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