WIAS Preprint No. 576, (2000)

Heterogeneous dynamic process flowsheet simulation of chemical plants


  • Grund, Friedrich
  • Ehrhardt, Klaus
  • Borchardt, Jürgen
  • Horn, Dietmar

2010 Mathematics Subject Classification

  • 65L05 80A30 65Y05 65H10


  • Chemical process simulation, Systems of differential-algebraic equations, Large-scale dynamic simulation, Coupled processes, Distributed simulation, Waveform iteration, Broyden update




For large-scale dynamic simulation problems in chemical process engineering, a heterogeneous simulation concept is described which allows to distribute the solution of the models of coupled dynamic subprocesses to a computer network. The main principle of such a technique is to solve the submodels of an overall model independently of each other on subsequent time intervals. This is done by estimating the vector of input variables of the submodels, calculating the corresponding time behaviour of the output variables concurrently, and matching the time profiles of the interconnecting variables of the process flowsheet iteratively. Therefore, accelerated waveform iteration methods are considered, using Broyden- and block-Broyden-type updates. The simulation concept is investigated especially in the case that the submodels do not provide input-output sensitivities.

Appeared in

  • W. Jaeger and H.-J. Krebs, editors: Mathematics - Key Technology for the Future . Joint Projects Between Universities and Industry, pages 184-193. Springer-Verlag Berlin Heidelberg, 2003

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