Methods for estimating wake flow and effluent dispersion near simple block-like buildings

Technical Report · Fri May 01 04:00:00 EDT 1981

DOI:https://doi.org/10.2172/5359876· OSTI ID:5359876

Hosker, Jr., R. P.

This report is intended as an interim guide for those who routinely face air quality problems associated with near-building exhaust stack placement and height, and the resulting concentration patterns. Available data and methods for estimating wake flow and effluent dispersion near isolated block-like structures are consolidated. The near-building and wake flows are described, and quantitative estimates for frontal eddy size, height and extent of roof and wake cavities, and far wake behavior are provided. Concentration calculation methods for upwind, near-building, and downwind pollutant sources are given. For an upwind source, it is possible to estimate the required stack height, and to place upper limits on the likely near-building concentration. The influences of near-building source location and characteristics relative to the building geometry and orientation are considered. Methods to estimate effective stack height, upper limits for concentration due to flush roof vents, and the effect of changes in rooftop stack height are summarized. Current wake and wake cavity models are presented. Numerous graphs of important expressions have been prepared to facilitate computations and quick estimates of flow patterns and concentration levels for specific simple buildings. Detailed recommendations for additional work are given.

• Research Organization: National Oceanic and Atmospheric Administration, Silver Spring, MD (USA). Air Resources Lab.
• DOE Contract Number: AI05-76EV03688
• OSTI ID: 5359876
• Report Number(s): NOAA-TM-ERL-ARL-108; ON: DE82008600
• Country of Publication: United States
• Language: English

Related Subjects

500100* -- Environment
Atmospheric-- Basic Studies-- (-1989)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
510500 -- Environment
Terrestrial-- Site Resource & Use Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
AERODYNAMICS
AIR FLOW
AIR POLLUTION
AIR POLLUTION CONTROL
AIR QUALITY
BOUNDARY LAYERS
BUILDINGS
CONTROL
DIFFUSION
DIMENSIONS
DOCUMENT TYPES
EARTH ATMOSPHERE
ENVIRONMENTAL QUALITY
ENVIRONMENTAL TRANSPORT
EXHAUST GASES
FLUID FLOW
FLUID MECHANICS
FLUIDS
FORECASTING
GAS FLOW
GASEOUS WASTES
GASES
GRAPHS
HEIGHT
LAYERS
MANAGEMENT
MANUALS
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICS
PLUMES
POLLUTION
POLLUTION CONTROL
POLLUTION SOURCES
ROOFS
STACK DISPOSAL
STACKS
TURBULENCE
VENTILATION
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
WIND