An initialization subroutine for DAEs solvers: DAEIS

Authors
Citation
B. Wu et Re. White, An initialization subroutine for DAEs solvers: DAEIS, COMPUT CH E, 25(2-3), 2001, pp. 301-311
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
COMPUTERS & CHEMICAL ENGINEERING
ISSN journal
0098-1354 → ACNP
Volume
25
Issue
2-3
Year of publication
2001
Pages
301 - 311
Database
ISI
SICI code
0098-1354(20010315)25:2-3<301:AISFDS>2.0.ZU;2-M
Abstract
Numerical difficulty arises when DAEs are solved with inconsistent initial values of dependent variables. II can cause the solution failures of many p opular DAEs solvers. An initialization subroutine, DAEIS (Differential Alge braic Equations Initialization Subroutine), has been developed to handle th is issue. In DAEIS, consistent initial values of dependent variables for in dex-1 DAEs are obtained through solving a set of nonlinear equations based on the initialization settings. To achieve good efficiency and robustness o f the initialization computation, a nonlinear equation solver, GNES, has be en specially built for DAEIS. The usage of DAEIS is demonstrated through ha ndling inconsistent initializations for combined continuous/discrete simula tions. (C) 2001 Elsevier Science Ltd. All rights reserved.