کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
662116 | 1458170 | 2006 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Thermally developing flow and heat transfer in rectangular microchannels of different aspect ratios Thermally developing flow and heat transfer in rectangular microchannels of different aspect ratios](/preview/png/662116.png)
Laminar convective heat transfer in the entrance region of microchannels of rectangular cross-section is investigated under circumferentially uniform wall temperature and axially uniform wall heat flux thermal boundary conditions. Three-dimensional numerical simulations were performed for laminar thermally developing flow in microchannels of different aspect ratios. Based on the temperature and heat flux distributions obtained, both the local and average Nusselt numbers are presented graphically as a function of the dimensionless axial distance and channel aspect ratio. Generalized correlations, useful for the design and optimization of microchannel heat sinks and other microfluidic devices, are proposed for predicting Nusselt numbers. The proposed correlations are compared with other conventional correlations and with available experimental data, and show very good agreement.
Journal: International Journal of Heat and Mass Transfer - Volume 49, Issues 17–18, August 2006, Pages 3060–3067