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http://cidesi.repositorioinstitucional.mx/jspui/handle/1024/117| CFD simulation of forced convection heat transfer of laminar phase-change non-newtonian fluis in rectangular straight micro-channels | |
| ADI CORRALES MAGALLANES | |
| J. RENE ESTRADA ESTRADA GABRIEL VENTURA SUAREZ Leonardo Baldenegro_Perez | |
| Acceso Abierto | |
| Atribución-NoComercial | |
| Mecánica de fluídos | |
| "The department of Engineering Technology and Industrial Distribution (ETID) at the University of Texas A&M, in College Station, Texas is at the vanguard of modeling fluids to evaluate their heat transfer performance under various conditions. Until now, they have been working with Newtonian flows, single phase and with a phase change material, but their work will now include non-Newtonian fluids, also in single phase and with a phase change material. This work presents the first studies of non-Newtonian flows with phase change materials done in this department as an introduction for further investigation. Several analyses were done in this work to compare the heat transfer performance of various rectangular micro-channels with different aspect ratios and non-Newtonian power law fluids as a single phase fluid and with a phase change material (PCM). The performance was compared by calculating the Nusselt number (Nu) and the Fanning friction factor (f) and then, with the thermal performance factor. The cases were tested under a constant heat flux with constant peripheral temperature (H1) and constant wall temperature (CWT) boundary conditions. Only the fully developed region where analyzed, and the entry region was set as combined, allowing the hydrodynamic and the thermal development simultaneously. The phase change effects were simulated using a specific heat model. The rectangular tubes with a lower aspect ratio height/width were found to have higher values of Nu for the same fluid. In terms of viscosity, the fluids with lower power law indexes were found to have the highest values. Comparing single phase fluids with the slurry formed by a non-Newtonian carrier and a PCM, the slurry presented a notable increment of the value of Nu during the phase change of the fluids under H1 condition, while the fluids under CWT presented only an increment of the value during the entry region. The case that presented the higher values of Nu was with PCM slurry in a rectangular micro-channel with low aspect ratio, and a fluid with low power index, but only during the phase CFD simulation of forced convection heat transfer of laminar phase-change non-Newtonian fluids in rectangular straight micro-channels iv change region, as the values in the sub-cooled and liquid region converges to the values of the single phase fluid." | |
| 2010-09 | |
| Tesis de maestría | |
| Inglés | |
| DE-MX | |
| Público en general | |
| OTRAS | |
| Aparece en las colecciones: | Simulaciones de ingeniería y caracterización experimental |
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| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| M-ACM-2010.pdf | 3.48 MB | Adobe PDF | Visualizar/Abrir |