Record Display for the EPA National Library Catalog


Main Title Simulating the Effects of Upstream Turbulence on Dispersion Around a Building.
Author Zhang, Y. Q. ; Arya, S. P. S. ; Huber, A. H. ; Snyder, W. H. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. ;North Carolina State Univ. at Raleigh. Dept. of Marine, Earth and Atmospheric Sciences. ;National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Air Resources Lab.;Academia Sinica, Beijing (China).
Publisher 1992
Year Published 1992
Report Number EPA/600/A-92/228;
Stock Number PB93-119881
Additional Subjects Turbulence ; Buildings ; Computational fluid dynamics ; Flow distribution ; Wind shear ; Computational grids ; Velocity distribution ; Computer programs ; Turbulent flow ; Energy dissipation ; Computerized simulation ; Accuracy ; Turbulent boundary layer ; Mathematical models ; TEMPEST Computer program
Library Call Number Additional Info Location Last
NTIS  PB93-119881 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 14p
The effects of high turbulence versus no turbulence in a sheared boundary-layer flow approaching a building are being investigated by a turbulent kinetic energy/dissipation model (TEMPEST). The effects on both the mean flow and the concentration field around a cubical building are presented. The numerical simulations demonstrate significant effects due to the differences in the incident flow. The addition of upstream turbulence results in a reduced size of the cavity directly behind the building. The velocity deficits in the wake strongly depend on the upstream turbulence intensities. The accuracy of numerical simulations is verified by comparing the predicted mean flow and concentration fields with the wind tunnel measurements of Castro and Robins (1977) and Robins and Castro (1977, 1975). Comparing the results with experimental data, the authors show that the TEMPEST model can reasonably simulate the mean flow. The numerical simulations of the concentration fields due to a source on the roof-top of the building are presented. Both the value and the position of the maximum ground-level concentration are changed dramatically due to the effects of the upstream level of turblence.