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RECORD NUMBER: 444 OF 1721

OLS Field Name OLS Field Data
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)
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NTIS  PB-206 412 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
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