کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4914757 | 1427718 | 2018 | 12 صفحه PDF | دانلود رایگان |
- Trapezoidal cooling microchannel is optimized using constructral theory.
- Two phase Eulerian-Lagrangian method used for modeling of nanofluid.
- Microchannel with side angle 75 has the maximum overall conductivity.
- Optimal volume fraction will be occurred in range of 0.4 â¤Â η â¤Â 0.5.
In this study, the performance of micro heat sink with nanofluid of water- Al2O3 of 1% and the optimum geometry dimensions are evaluated in the trapezoidal microchannel by using constructal theory and the two-phase Eulerian-Lagrangian method. Also, the optimal microchannel diameter obtained with the intersection of asymptotes method, was compared with the numerical state. The results show that for a constant pressure drop, microchannel with a 70° side angle in the optimum state, has the maximum total thermal conductivity in the dimensionless state. In addition, by reducing the side angle of the trapezoidal cross-section, the total thermal conductivity would be reduced in a dimensionless state. The maximum thermal conductivity in a trapezoidal microchannel will happen in the volume fraction range of 0.4 â¤Â η â¤Â 0.5. The maximum and minimum error between numerical and analytical study for the optimum hydraulic diameter is 47.54% and 3.2%, respectively.
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Journal: Powder Technology - Volume 323, 1 January 2018, Pages 103-114