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RECORD NUMBER: 9 OF 36

OLS Field Name OLS Field Data
Main Title Evaluation of Numerical Schemes for Solving a Conservation of Species Equation with Chemical Terms.
Author Eskridge, Robert E. ; Demerjian., Kenneth L. ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, N.C.
Year Published 1977
Report Number EPA/600/J-77/119;
Stock Number PB-281 007
Additional Subjects Atmospheric models ; Reaction kinetics ; Air pollution ; Partial differential equations ; Numerical analysis ; Nonlinear differential equations ; Reprints ; Air quality
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-281 007 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 8p
Abstract Numerical methods are investigated for solving a system of continuity equations that contain linear and nonlinear chemistry as source and sink terms. It is shown that implicit, finite-difference approximations, when applied to the chemical kinetic terms, yield accurate results when the equations are linear, but give poor results when the equations are nonlinear. In fact, when the equations are nonlinear, the implicit finite-difference scheme will be unstable if delta t is large. It is shown that for urban and larger scale air quality simulation models, the advection and chemical terms are more accurate than implicit treatments of the chemistry.
Supplementary Notes Pub. in Atmospheric Environment, v11 n11 p1029-1035 Nov 77.
NTIS Title Notes Journal article.
Title Annotations Reprint: Evaluation of Numerical Schemes for Solving a Conservation of Species Equation with Chemical Terms.
PUB Date Free Form 27 Apr 77
Category Codes 4A; 68A; 55E
NTIS Prices PC A02/MF A01
Primary Description 600/09
Document Type NT
Cataloging Source NTIS/MT
Control Number 323741448
Origin NTIS
Type CAT