Index and Characteristic Analysis of Linear PDAE Systems

TitleIndex and Characteristic Analysis of Linear PDAE Systems
Publication TypeJournal Article
Year of Publication2003
AuthorsMartinson WS, Barton PI
JournalSIAM Journal on Scientific Computing
Keywordscharacteristics, differentiation index, index, partial differential equations, partial differential-algebraic equations, perturbation index, well-posedness

Automatable analyses of the index and well-posedness of two general classes of linear PDAEs are presented for use in equation-based dynamic simulation packages. These analyses determine whether a problem possesses a unique solution trajectory, the potential effect of noise in the initial and boundary conditions on the calculated solution, and the index of the model equations. Measures of the degeneracy of the system, rather than a differentiation index, bound the order of derivatives of forcing functions that appear in the solution.