Wind flow study: July 1987 and November-December 1987

Technical Report · Fri Jan 01 00:00:00 EST 1988

OSTI ID:5092020

Chapman, K R; Gouveia, F J

For a ten-day period in July 1987, two meteorological towers were used to evaluate wind flow and surface roughness in a grassy field west of Building 111 at LLNL. We recorded 512-s averages of wind speed and wind direction at one level and temperature at two levels to document local wind flow and thermal stability. These data show the wind direction during this data-collection period to be mostly from the southwest quadrant. Six anemometers were spaced logarithmically along a 2.5-m mast to measure vertical wind speed profiles. The average surface roughness calculated from these profiles under near-neutral atmospheric stability was 15.6 cm. For a five-week period in November and December 1987, we took additional wind speed measurements in the same field to further document wind flow. Wind direction and temperature data were collected at a 40-m tower near the northeast corner of the Laboratory. Additional profile and turbulence parameters were calculated with this data set: alpha, drag coefficient, and turbulent intensity. Variations and averages were analyzed, and averages for stability and wind direction categories are presented. 6 refs., 79 figs., 6 tabs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5092020
• Report Number(s): UCID-21360; ON: DE88008969
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
LAWRENCE LIVERMORE LABORATORY
WIND
AMBIENT TEMPERATURE
DRAG
EXPERIMENTAL DATA
METEOROLOGY
PROGRESS REPORT
ROUGHNESS
SURFACE PROPERTIES
TEMPERATURE GRADIENTS
TURBULENCE
DATA
DOCUMENT TYPES
INFORMATION
NATIONAL ORGANIZATIONS
NUMERICAL DATA
US AEC
US DOE
US ERDA
US ORGANIZATIONS
500100* - Environment
Atmospheric- Basic Studies- (-1989)