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Aerodynamics and Fluid Mechanics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
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- Boundary layer (2)
- Street canyon (2)
- Wind tunnel (2)
- Analytical modeling (1)
- Coherent structures (1)
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- Ground mounted (1)
- Heat transfer (1)
- Independent component analysis (ICA) (1)
- Modal analysis (1)
- Morphological model (1)
- PIV (1)
- Particle Image Velocimetry (1)
- Proper orthogonal decomposition (POD) (1)
- RANS (1)
- Scale interaction (1)
- Solar (PV) panels (1)
- Tall building (1)
- Tornado-like vortex (1)
- Turbulence (1)
- Wind loading (1)
Articles 1 - 4 of 4
Full-Text Articles in Aerodynamics and Fluid Mechanics
Effect Of Morphology And An Upstream Tall Building On A Street Canyon Flow, Haoran Du
Effect Of Morphology And An Upstream Tall Building On A Street Canyon Flow, Haoran Du
Electronic Thesis and Dissertation Repository
The effects of the morphological model and the existence of an upstream tall building on the turbulent street canyon flow and the overlying boundary layer are investigated in a wind tunnel, using Stereoscopic Particle Image Velocimetry (S-PIV) measurements. The velocity variances, Reynolds shear stress, and turbulent kinetic energy are found to be larger than in a similar idealized street canyon model. Increasing building height results in a decrease in vertical mass fluxes across the opening of the canyon, at least in the canyon portion directly downstream of the building. The interaction between the large-scale structures in the overlying boundary layer …
Modal Analysis And Analytical Modeling Of Tornado-Like Vortices, Mohammad Karami
Modal Analysis And Analytical Modeling Of Tornado-Like Vortices, Mohammad Karami
Electronic Thesis and Dissertation Repository
Regardless of the type of vortex chamber, many tornado simulators generate flows that reveal similar flow patterns and a general agreement on the variations of the flow structures with swirl ratio (the ratio of tangential velocity to radial velocity) was achieved. However, very little is known about the underlying physics of the flow, mostly of the fluctuating one, as the previous studies have mainly focused on qualitative flow visualization and the quantitative description of the mean flow.
Herein, coherent structures in tornado-like vortices are extracted using modal decomposition techniques. Modal analysis helps us to better understand the complex vortex dynamics …
The Spanwise Structure Of The Roof-Level Turbulence In A Street Canyon Flow, Tomek Jaroslawski
The Spanwise Structure Of The Roof-Level Turbulence In A Street Canyon Flow, Tomek Jaroslawski
Electronic Thesis and Dissertation Repository
In the present work, for the first time, the spanwise organization of turbulent flow along an urban street canyon subjected to wind normal to the street axis using a boundary layer wind tunnel is systematically investigated.The effect of upstream roughness and canyon width on the turbulence in a street canyon flow is presented. Measurements in a horizontal plane were conducted at near roof-level of a street canyon using Stereoscopic Particle Image Velocimetry. Three upstream roughness arrays and two canyon width (W) to height (h) aspect ratios (AR = W / h = 1 and 3) were …
Wind And Thermal Effects On Ground Mounted Photovoltaic (Pv) Panels, Chowdhury Mohammad Jubayer
Wind And Thermal Effects On Ground Mounted Photovoltaic (Pv) Panels, Chowdhury Mohammad Jubayer
Electronic Thesis and Dissertation Repository
A combination of Computational Fluid Dynamics (CFD) simulations and wind tunnel experiments are carried out to investigate the effects of wind on the aerodynamic loading and heat transfer of a ground mounted stand-alone photovoltaic (PV) panel with tilt angle of 25o in open country atmospheric boundary layer. Several azimuthal wind directions are considered: Southern 0o, Southwest 45o, Northwest 135o and Northern 180o. Three dimensional Reynolds-Averaged Navier-Stokes (RANS) approaches with an unsteady solver using Shear Stress Transport (SST) k-ω turbulence closure are employed for the CFD simulations, whereas Particle Image Velocimetry (PIV) and …