Title of article :
Parameter estimation and accuracy matching strategies for 2-D reactor models
Author/Authors :
Nowak، نويسنده , , U. and Grah، نويسنده , , A. and Schreier، نويسنده , , M.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
11
From page :
301
To page :
311
Abstract :
The mathematical modelling of a special modular catalytic reactor kit leads to a system of partial differential equation in two space dimensions. As customary, this model contains uncertain physical parameters, which may be adapted to fit experimental data. To solve this nonlinear least-squares problem we apply a damped Gauss–Newton method. A method of lines approach is used to evaluate the associated model equations. By an a priori spatial discretization, a large DAE system is derived and integrated with an adaptive, linearly implicit extrapolation method. For sensitivity evaluation we apply an internal numerical differentiation technique, which reuses linear algebra information from the model integration. In order not to interfere with the control of the Gauss–Newton iteration these computations are done usually very accurately and, therefore, with substantial cost. To overcome this difficulty, we discuss several accuracy adaptation strategies, e.g., a master–slave mode. Finally, we present some numerical experiments.
Keywords :
Parameter estimation , Accuracy matching , method of lines , Differential-algebraic systems , Extrapolation methods , Catalytic reactor models
Journal title :
Journal of Computational and Applied Mathematics
Serial Year :
2005
Journal title :
Journal of Computational and Applied Mathematics
Record number :
1553069
Link To Document :
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