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Wind and Structures
  Volume 30, Number 1, January 2020 , pages 99-117

Peak pressures on low rise buildings: CFD with LES versus full scale and wind tunnel measurements
Aly Mousaad Aly and Hamzeh Gol-Zaroudi

    This paper focuses on the processes of wind flow in atmospheric boundary layer, to produce realistic full scale pressures for design of low-rise buildings. CFD with LES turbulence closure is implemented on a scale 1:1 prototype building. A proximity study was executed computationally in CFD with LES that suggests new recommendations on the computational domain size, in front of a building model, apart from common RANS-based guidelines (e.g., COST and AIJ). Our findings suggest a location of the test building, different from existing guidelines, and the inflow boundary proximity influences pressure correlation and reproduction of peak loads. The CFD LES results are compared to corresponding pressures from open jet, full scale, wind tunnel, and the ASCE 7-10 standard for roof Component & Cladding design. The CFD LES shows its adequacy to produce peak pressures/loads on buildings, in agreement with field pressures, due to its capabilities of reproducing the spectral contents of the inflow at 1:1 scale.
Key Words
    Atmospheric Boundary Layer (ABL); building aerodynamics; wind loading correlation; turbulence; wind pressure measurement; Large Eddy Simulation (LES); vortex method; Component and Cladding (C&C) design; scale effects
(1) Aly Mousaad Aly:
Winsdstorm Impach, Science and Engineering (WISE) Lab, Civil & Environmental Engineering, Louisiana State University, Baton Rouge, USA;
(2) Hamzeh Gol-Zaroudi:
Windstorm Impact, Science and Engineering(WISE), Louisiana State University, Research & Modeling, AIR Worldwide, Boston, USA.

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