Record Display for the EPA National Library Catalog


Main Title Invariant modeling of turbulence and diffusion in the planetary boundary layer /
Other Authors
Author Title of a Work
Lewellen, W. S.
Fox, Douglas G.
Publisher Meteorology Laboratory, National Environmental Research Center,
Year Published 1974
Report Number EPA-650/4-74-035; ARAP-225; EPA-68-02-1310
Stock Number PB239323
OCLC Number 52565072
Subjects Turbulent boundary layer--Mathematical models ; Turbulence--Mathematical models ; Atmospheric diffusion--Mathematical models ; Air--Pollution--Mathematical models
Additional Subjects Atmospheric motion ; Turbulence ; Air pollution ; Computerized simulation ; Mathematical models ; Wind(Meteorology) ; Boundary layers ; Atmospheric diffusion ; Plumes ; Diurnal variations ; Atmospheric boundary layer
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 650-4-74-035 c.1 Headquarters Library/Washington,DC 05/07/2013
EKBD  EPA-650/4-74-035 Research Triangle Park Library/RTP, NC 04/17/2019
ELBD ARCHIVE EPA 650-4-74-035 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ESAD  EPA 650-4-74-035 Region 10 Library/Seattle,WA 09/17/2004
NTIS  PB-239 323 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vii, 105 pages : illustrations, charts ; 28 cm.
Significant progress has been made toward the goal of developing a viable computer model based on second-order closure of the turbulent correlation equations for predicting the fate of nonchemically reacting contaminants released in the atmospheric boundary layer. The invariant turbulent model discussed in previous reports has been modified both by extending its capabilities and by developing approximations to the full system of equations which may be used in complicated flow geometries where economy of computing time justifies some compromise in accuracy. Sample calculations of several flow problems of current practical interest are included. These are: that of the diurnal variations in the turbulence distributions in the planetary boundary layer induced by the unsteady surface heat flux; the spatial variation of turbulence occurring when the wind blows over an abrupt change in surface roughness; and the dispersal of a plume released at different heights, under different stability conditions, and over different terrain.
"EPA project officer: Douglas G. Fox." "Prepared for Office of Research and Development, U.S. Environmental Protection Agency." "September 1974." "Contract No. 68-02-1310; Grant No. R-800662; ROAP No. 21ADO; Program Element No. 1AA009; " "EPA-650/4-74-035." PB 239 323--NTIS. Includes bibliographical references.