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Wind and Structures
  Volume 4, Number 4, August 2001 , pages 279-298
DOI: https://doi.org/10.12989/was.2001.4.4.279
 


A model of roof-top surface pressures produced by conical vortices:Evaluation and implications
D. Banks and R.N. Meroney(U.S.A.)rn

 
Abstract
    The greatest suction on the cladding of flat roof low-rise buildings is known to occur beneathrnthe conical vortices that form along the roof edges for cornering winds. In a companion paper, a model ofrnthe vortex flow mechanism has been developed which can be used to connect the surface pressure beneathrnthe vortex to adjacent flow conditions. The flow model is experimentally validated in this paper usingrnsimultaneous velocity and surface pressure measurement on a 1 : 50 model of the Texas Tech Universityrnexperimental building in a wind tunnel simulated atmospheric boundary layer. Flow visualization givesrnfurther insight into the nature of peak suction events. The flow model is shown to account for the increasernin suction towards the roof corner as well as the presence of the highest suction at wind angles of 60
 
Key Words
    wind; vortex; load; pressure; low-rise; building; flow separation.
 
Address
D. Banks and R. N. Meroney, Fluid Mechanics and Wind Engineering Program, Civil Engineering Department, Colorado State University, Fort Collins, CO 80523, U.S.A.
 

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