Simulating the effects of upstream turbulence on dispersion around a building

Technical Report · Wed Jan 01 00:00:00 EST 1992

OSTI ID:6829733

Zhang, Y Q; Arya, S P.S.; Huber, A H; Snyder, W H

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.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (United States). Atmospheric Research and Exposure Assessment Lab.
• OSTI ID: 6829733
• Report Number(s): PB-93-119881/XAB; EPA-600/A-92/228
• 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

Related Subjects

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
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& Utilization- Building Services- (1987-)
540110
990200 - Mathematics & Computers