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Full-Text Articles in Mechanical Engineering
Channel Flow Behaviour During Mixed Convection At Low Reynolds Numbers, Ahmed Elatar
Channel Flow Behaviour During Mixed Convection At Low Reynolds Numbers, Ahmed Elatar
Electronic Thesis and Dissertation Repository
The effect of mixed convection on low Reynolds numbers flow inside a horizontal square channel heated from below have been investigated experimentally. The channel flow rate ranged from 0.0210 kg/s to 0.0525 kg/s which correspond to Reynolds numbers between 300 and 750 in the absence of heating. The channel bottom surface temperature was controlled and varied from 30 ºC to 55 ºC (Grashof number ranged between 6.37×106 and 3.86×107). Planer Particle Image Velocimetry (PIV) technique was used to measure two-dimensional velocity fields in the channel mid-vertical plane and two horizontal planes close to the bottom heated wall. …
Experimental Investigation Of Wind Effect On Solar Panels, Ayodeji Abiola-Ogedengbe
Experimental Investigation Of Wind Effect On Solar Panels, Ayodeji Abiola-Ogedengbe
Electronic Thesis and Dissertation Repository
Photovoltaic Solar Panels for electricity generation are outdoor low-rise structures that are vulnerable to damage by the wind. The existing building codes do not contain information about the impact of the wind on these structures and hence do not provide comprehensive guidelines to mitigate such impact. The present study is a contribution to the ongoing efforts to codify the wind loading on solar panels. In this study, experimental investigations were conducted on the scaled model of a ground-mounted solar panel structure whose surface is geometrically similar to an inclined flat plate and mounted on three-legged support. The panel comprises of …
An Experimental Investigation On The Flow Behaviour In A Transpired Air Collector, David Greig
An Experimental Investigation On The Flow Behaviour In A Transpired Air Collector, David Greig
Electronic Thesis and Dissertation Repository
An experimental investigation of the flow dynamics in a transpired air collector channel with a corrugated surface is presented. Particle image velocimetry (PIV) was used to obtain twodimensional velocity fields to compare the effects of surface heating on the flow for five flow rates. Mean velocity and turbulent property profiles are presented and compared. Proper orthogonal decomposition and wavenumber spectrum analyses were also conducted to investigate the underlying interactions between the turbulent structures that comprise the complex flow behaviour observed in corrugated flows. Results show that the corrugated waveform was the primary source of turbulence at all flow rates and …