Methods for estimating wake flow and effluent dispersion near simple block-like buildings. Technical memo
Technical Report
·
OSTI ID:6519752
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. The report consolidates available data and methods for estimating wake flow and effluent dispersion near isolated block-like structures. 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.
- Research Organization:
- National Oceanic and Atmospheric Administration, Silver Spring, MD (USA). Air Resources Lab.
- OSTI ID:
- 6519752
- Report Number(s):
- PB-82-219031; NOAA-TM-ERL-ARL-108
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
500100 -- Environment
Atmospheric-- Basic Studies-- (-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
BUILDINGS
CHIMNEYS
DESIGN
DIMENSIONS
FLUID FLOW
GAS FLOW
HEIGHT
MANAGEMENT
MATHEMATICAL MODELS
PLUMES
POLLUTION
STACK DISPOSAL
STACKS
WASTE DISPOSAL
WASTE MANAGEMENT
Atmospheric-- Basic Studies-- (-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
BUILDINGS
CHIMNEYS
DESIGN
DIMENSIONS
FLUID FLOW
GAS FLOW
HEIGHT
MANAGEMENT
MATHEMATICAL MODELS
PLUMES
POLLUTION
STACK DISPOSAL
STACKS
WASTE DISPOSAL
WASTE MANAGEMENT