Publicou 8 edições por ano
ISSN Imprimir: 1065-5131
ISSN On-line: 1563-5074
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AN EXPERIMENTAL INVESTIGATION OF HEAT TRANSFER PERFORMANCE OF WAVY CHANNELS UNDER LAMINAR FLOW CONDITIONS: AN INTERFEROMETRIC STUDY
RESUMO
The thermal performance of wavy channels with different phase shifts (φ = 0° and 180°) introduced between the top and bottom conducting walls was experimentally investigated using a typical Mach-Zehnder interferometer. The experiments were performed on compact plane and wavy channels (with varying phase shifts and similar hydraulic diameters) in deionized water (Pr = 6.13) for a range of Reynolds numbers (Re = 350-1000). The interferometric fringes were recorded in both infinite and wedge fringe setting modes and then used to qualitatively and quantitatively analyze the local and average profiles of the thermal boundary layer thickness and heat transfer rates. The effects of the phase shifts and Reynolds numbers on the heat transfer rates are discussed. The experimental results show an increment in the heat transfer rates in the wavy channel geometries compared to straight channels, accompanied by an increased pressure drop. The thermal performance factor (TPF) was evaluated, and it was observed that the TPF increased with increasing Reynolds numbers in the wavy channels at both phase shifts (φ = 0° and 180°).
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