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The Computer Journal 1974 17(1):28-37; doi:10.1093/comjnl/17.1.28
© 1974 by British Computer Society
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A SIMULA-based structure oriented language for the dynamic simulation of chemical plants*

J. H. Kardasz § and G. Molnar

Istituto di Elaborazione dell'Informazione, Consiglio Nazionale della Ricerche, Pisa, Italy

This paper presents a general description of a language for the simulation of the dynamic behaviour of chemical plants. The language is structure-oriented according to the flowsheet of the plant to be simulated. The implementation is achieved by using SIMULA 67. The method of simulation is based on the concept of a cell model. Under the assumption of the one-dimensional model, a chemical plant composed of a set of devices, can be represented mathematically by a set of quasi-linear hyperbolic partial differential equations of the first order. After appropriate discretisation, each device is subdivided into a finite number of cells; this is equivalent to the application of the finite difference method in explicit form. The paper contains an example of typical chemical plant for which a program written in our language is given.

Received May 1972.

* This is a revised version of a paper presented at the IFAC Symposium on Digital Simulation of Continous Processes (DISCOP) which was held in Györ, Hungary at the begining of September 1971.

§ It is with regret that we have to announce that Julius Kardasz died whilst this paper was being processed.

Istituto di Elaborazione dell'Informazione, Consiglio Nazionale della Ricerche, 56100 - Pisa, ITALY


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