### Abstract

Structure-based modelling is an alternative knowledge representation technique, where the problem is formulated as the structure of connected but autonomous elements instead of a mathematical construction (e.g. differential equation). Taking the opportunity that the structural elements can directly be accessed, a new method for the solution of large scale stiff problems is presented. The example is the oxidativc coupling of methane in gas phase with a kinetic model of 164 elementary reactions and 27 components. The method is based on a runtime model reduction carried out simultaneously with the dynamic simulation considering the actual rate of reactions and the actual concentrations of components. Coarse and fine, as well as irreversible and reversible transformation strategies are introduced and compared.

Original language | English |
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Journal | Computers and Chemical Engineering |

Volume | 20 |

Issue number | SUPPL.1 |

Publication status | Published - 1996 |

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### ASJC Scopus subject areas

- Chemical Engineering(all)
- Control and Systems Engineering

### Cite this

*Computers and Chemical Engineering*,

*20*(SUPPL.1).

**New solution of stiff problems by automatic transformation of the structural model.** / Varga, K.; Csukás, B.

Research output: Contribution to journal › Article

*Computers and Chemical Engineering*, vol. 20, no. SUPPL.1.

}

TY - JOUR

T1 - New solution of stiff problems by automatic transformation of the structural model

AU - Varga, K.

AU - Csukás, B.

PY - 1996

Y1 - 1996

N2 - Structure-based modelling is an alternative knowledge representation technique, where the problem is formulated as the structure of connected but autonomous elements instead of a mathematical construction (e.g. differential equation). Taking the opportunity that the structural elements can directly be accessed, a new method for the solution of large scale stiff problems is presented. The example is the oxidativc coupling of methane in gas phase with a kinetic model of 164 elementary reactions and 27 components. The method is based on a runtime model reduction carried out simultaneously with the dynamic simulation considering the actual rate of reactions and the actual concentrations of components. Coarse and fine, as well as irreversible and reversible transformation strategies are introduced and compared.

AB - Structure-based modelling is an alternative knowledge representation technique, where the problem is formulated as the structure of connected but autonomous elements instead of a mathematical construction (e.g. differential equation). Taking the opportunity that the structural elements can directly be accessed, a new method for the solution of large scale stiff problems is presented. The example is the oxidativc coupling of methane in gas phase with a kinetic model of 164 elementary reactions and 27 components. The method is based on a runtime model reduction carried out simultaneously with the dynamic simulation considering the actual rate of reactions and the actual concentrations of components. Coarse and fine, as well as irreversible and reversible transformation strategies are introduced and compared.

UR - http://www.scopus.com/inward/record.url?scp=0029703773&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029703773&partnerID=8YFLogxK

M3 - Article

VL - 20

JO - Computers and Chemical Engineering

JF - Computers and Chemical Engineering

SN - 0098-1354

IS - SUPPL.1

ER -