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Title: Simulating the effects of upstream turbulence on dispersion around a building

Abstract

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.

Authors:
; ; ;
Publication Date:
Research Org.:
Environmental Protection Agency, Research Triangle Park, NC (United States). Atmospheric Research and Exposure Assessment Lab.
OSTI Identifier:
6829733
Report Number(s):
PB-93-119881/XAB; EPA-600/A-92/228
Resource Type:
Technical Report
Resource Relation:
Other Information: Pub. in International Summer Colloquium/International Symposium for Young Science on Climate (4th), Beijing, China, July 20-29, 1992. See also PB--93-119873 and PB--92-232453
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 54 ENVIRONMENTAL SCIENCES; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; AIR FLOW; TURBULENCE; BUILDINGS; WIND LOADS; COMPUTERIZED SIMULATION; VELOCITY; DISSIPATION FACTOR; EXPERIMENTAL DATA; LEADING ABSTRACT; MATHEMATICAL MODELS; SHEAR; TURBULENT FLOW; ABSTRACTS; DATA; DOCUMENT TYPES; DYNAMIC LOADS; FLUID FLOW; GAS FLOW; INFORMATION; NUMERICAL DATA; SIMULATION; 320105* - Energy Conservation, Consumption, & Utilization- Building Services- (1987-); 540110; 990200 - Mathematics & Computers

Citation Formats

Zhang, Y Q, Arya, S P.S., Huber, A H, and Snyder, W H. Simulating the effects of upstream turbulence on dispersion around a building. United States: N. p., 1992. Web.
Zhang, Y Q, Arya, S P.S., Huber, A H, & Snyder, W H. Simulating the effects of upstream turbulence on dispersion around a building. United States.
Zhang, Y Q, Arya, S P.S., Huber, A H, and Snyder, W H. 1992. "Simulating the effects of upstream turbulence on dispersion around a building". United States.
@article{osti_6829733,
title = {Simulating the effects of upstream turbulence on dispersion around a building},
author = {Zhang, Y Q and Arya, S P.S. and Huber, A H and Snyder, W H},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6829733}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}

Technical Report:
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