Highly stable explicit technique for stiff reaction-transport PDEs [electronic resource].

Published:: Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1996.
Physical Description:: 11 pages : digital, PDF file
Additional Creators:: United States. Department of Energy. Office of Scientific and Technical Information

Access Online

www.osti.gov

Availability

Finding items...

Restrictions on Access:

Free-to-read Unrestricted online access

Summary:

The numerical simulation of chemically reacting flows is a topic that has attracted a great deal of current research. At the heart of numerical reactive flow simulations are large sets of coupled, nonlinear partial differential equations (PDEs). Due to the stiffness that is usually present, explicit time differencing schemes are not used despite their inherent simplicity and efficiency on parallel and vector machines, since these schemes require prohibitively small numerical stepsizes. Implicit time differencing schemes, although possessing good stability characteristics, introduce a great deal of computational overhead necessary to solve the simultaneous algebraic system at each timestep. This paper proposes an algorithm based on a preconditioned time differencing scheme. The algorithm is explicit and permits a large stable time step. A study of the algorithm's performance on a parallel architecture is presented.

Report Numbers:

E 1.99:ucrl-jc-126371
E 1.99: conf-970342--
conf-970342--
ucrl-jc-126371

Subject(s):

Other Subject(s):

Note:

Published through SciTech Connect.
12/01/1996.
"ucrl-jc-126371"
" conf-970342--"
"DE98051006"
8th SIAM Conference on Parallel Processing for Scientific Computing, Minneapolis, MN (US), 03/14/1997--03/17/1997.
Aro, C. J., LLNL.
(US)

Funding Information:

W-7405-Eng-48

View MARC record | catkey: 14140745