Record Display for the EPA National Library Catalog

RECORD NUMBER: 20 OF 30

OLS Field Name OLS Field Data
Main Title Laboratory Simulation of Turbulent Convection Over an Urban Heat Island.
Author Lu, J. ; Arya, S. P. S. ; Snyder, W. H. ; Lawson, R. E. ;
CORP Author North Carolina State Univ. at Raleigh. Dept. of Marine, Earth and Atmospheric Sciences. ;National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Atmospheric Sciences Modeling Div.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher 1992
Year Published 1992
Report Number EPA/600/A-92/31;
Stock Number PB93-120871
Additional Subjects Heat islands ; Urban areas ; Convection ; Simulation ; Atmospheric diffusion ; Prandtl number ; Froude number ; Reynolds number ; Fluid dynamics ; Plumes ; Boundary layer flow ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB93-120871 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/08/1993
Collation 6p
Abstract
A systematic experimental study of the heat-island-induced circulation under turbulent conditions was conducted in the laboratory for an idealized, circular heat island in an initially thermally stratified fluid (water) in a convection tank with no ambient flow. The primary objectives of the study were to obtain a better understanding of the mean and turbulent flow generated by the heat island and to identify the appropriate similarity parameters and scales for simulating such a flow. Three non-dimensional similarity parameters were derived from the governing equations of motion. They are the convection Reynolds number (Re), the Froude number (Fr), and the Prandtl number (Pr). The data indicate that at sufficiently large Re, turbulent convection in the main flow becomes independent of Re which is the basis of the laboratory simulation. These measurements are also compared with field data from several cities and they agree with each other satisfactorily.