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Wake characteristics of buildings in disturbed boundary layersMeasurements relevant to the effect of buildings on the low level atmospheric boundary layer are presented. Field measurements of velocity and turbulence in the wake of a block building 3.2 m high and 26.8 m long are presented which show an apparent increase in momentum flow above the upwind value. Velocity-deficit and turbulence-excess decay characteristics of the disturbed or nonequilibrium layer are correlated with power law exponents and apparent roughness length at various distances downstream of the disturbance. Model wake profiles from the simulated building are compared at various stations for equilibrium and nonequilibrium upstream profiles. Empirical correlations relating building wake profiles to upstream nonequilibrium parameters are presented. The relationship of the data to the smooth-rough transition is discussed, and a flow model is presented.
Document ID
19800016447
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Logan, E., Jr. (Arizona State Univ. Tempe, AZ, United States)
Chang, J. (Arizona State Univ. Tempe, AZ, United States)
Date Acquired
September 4, 2013
Publication Date
May 1, 1980
Subject Category
Meteorology And Climatology
Report/Patent Number
M-298
NASA-CR-3284
Accession Number
80N24940
Funding Number(s)
CONTRACT_GRANT: NAS8-32357
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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