Main Title |
Development of a Simulation Model for Estimating Ground Level Concentrations of Photochemical Pollutants. Appendix D. Numerical Integration of the Continuity Equations. |
Author |
Reynold, Steven D. ;
|
CORP Author |
Systems Applications, Inc., Beverly Hills, Calif. |
Year Published |
1971 |
Report Number |
71SAI-21; CPA-70-148; 0911; |
Stock Number |
PB-206 412 |
Additional Subjects |
( Air pollution ;
Atmospheric models) ;
( Smog ;
Atmospheric models) ;
( Atmospheric motion ;
Air pollution) ;
Atmospheric composition ;
Urban areas ;
Mathematical models ;
Carbon monoxide ;
Applications of mathematics ;
California ;
Numerical integration ;
Finite difference theory ;
Los Angeles(California)
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-206 412 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
28p |
Abstract |
The simulation model for estimating ground level concentrations of photochemical pollutants is based on the equations of continuity for a turbulent fluid in which chemical reactions occur. A variant of the method of fractional steps is based on the repeated but separate solution of three two-dimensional problems--in (x,t), (y,t), and (z, t) space--at each time step. Experience indicates that the procedure (with second or fourth-order approximation included) is stable and poses no particular computational difficulties. The basis for the selection of the numerical technique adopted is discussed. A detailed exposition of the method is given. The discussion is concluded with an evaluation of the procedure and a summary of experience with its use. |
Supplementary Notes |
See also Appendix C, PB-206 411 and Appendix E, PB-206 413. |
PUB Date Free Form |
Jun 71, |
Category Codes |
13B; 4A; 68A |
NTIS Prices |
PC A03/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326525283 |
Origin |
NTIS |
Type |
CAT |