INVESTIGADORES
MAZZA German Delfor
artículos
Título:
On the use of incremental quotients in Michelsen's method for stiff ordinary differential equations
Autor/es:
G. F. BARRETO ; G. D. MAZZA
Revista:
COMPUTERS AND CHEMICAL ENGINEERING
Editorial:
Elsevier Science Ltd.
Referencias:
Lugar: Amsterdam; Año: 1989 vol. 13 p. 967 - 971
ISSN:
0098-1354
Resumen:
A systematic procedure for the use of incremental quotients instead of analytical derivatives in the Jacobians of Michelsen´s semi-implicit method (STIFF3) for stiff differential equations is presented. Runge-Kutta constants and step length adjustment criterion are modified to this end, and a mechanism for control of increment sizes is proposed. The procedure does not increase the number of function evaluations and its performance for some typical stiff systems is fully comparable to that with analytical derivatives.
