| Summary: | 碩士 === 中原大學 === 機械工程研究所 === 93 === This study investigated the behaviors of flow and temperature fields for single-phase low Reynolds number fluid flowing through triangular microchannels, using numerical analysis tool – CFDRC. In addition, comparisons were made among the results obtained from numerical simulations, experimental data, conventional correlations, and those in the literature.
The hydraulic diameters used in this study were in the range between 57 μm and 207 μm; the Reynolds numbers, 2 to 60. Deionized water was used as the working fluid. The results obtained indicated that the numerically obtained values of fRe were below and within 10% of the fRe values obtained from the conventional correlation for the macro fluidic system, while the fRe values obtained from numerical analyses were within 6% of the experimental data obtained for the triangular microchannels.
In addition, the Nusselt numbers obtained from numerical analysis were within 30% of those values obtained from the correlation by Wu and Cheng. Furthermore, it was observed that the temperature of the fluid inside the microchannels increases non-linearly as the distance from the entrance along the axial direction of the flow increases; the fluid flow rates have an impact on the entrance temperature and the overall temperature distribution.
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