| 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 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| 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 |
