Process Systems Engineering
Modeling of combined discrete/continuous processes
Article first published online: 17 JUN 2004
Copyright © 1994 American Institute of Chemical Engineers
Volume 40, Issue 6, pages 966–979, June 1994
How to Cite
Barton, P. I. and Pantelides, C. C. (1994), Modeling of combined discrete/continuous processes. AIChE J., 40: 966–979. doi: 10.1002/aic.690400608
- Issue published online: 17 JUN 2004
- Article first published online: 17 JUN 2004
- Manuscript Revised: 16 AUG 1993
- Manuscript Received: 29 DEC 1992
The dynamic behavior of processing systems exhibits both continuous and significant discrete aspects. Process simulation is therefore a combined discrete/continuous simulation problem. In addition, there is a critical need for a declarative process modeling environment to encompass the entire range of processing system operation, from purely continuous to batch. These issues are addressed by this article.
A new formal mathematical description of the combined discrete/continuous simulation problem is introduced to enhance the understanding of the fundamental discrete changes required to model processing systems. The modeling task is decomposed into two distinct activities: modeling fundamental physical behavior, and modeling the external actions imposed on this physical system. Both require significant discrete components. Important contributions include a powerful representation for discontinuities in physical behavior, and the first detailed consideration of how complex sequences of control actions may be modeled in a general manner.