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Natural convection flows inside differentially heated cavities

Bullee, P.A. (2015) Natural convection flows inside differentially heated cavities.

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Abstract:A natural convection driven flow inside a differentially heated square cavity with aspect ratio 4 is studied. The cavity is filled with water and the Rayleigh number is determined to be 1.14 x 10^10. Measurement results from different heights obtained using Laser Doppler Velocimetry are presented. These results were used together with a literature study to make a statement regarding the results obtained by another researcher using the same cavity. Concluded is that because of a mistake made when setting up the measurement equipment, his results regarding the flow field near the cold wall are invalid. Apart from this, special care is taken in optimizing the measurement procedure by reviewing the number of measurements required to obtain a reliable average velocity value. Thereby the number of seeding particles inside the cavity that visualize the flow is optimized.
Item Type:Internship Report (Master)
UFSC, Brazil
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Keywords:natural convection, square cavity, cavity flow, Laser Doppler Velocimetry
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