Abstract The performance of the microchannel heat sink (MCHS) in electronic applications needs to be optimized corresponding to the number of channels (N). In this study optimization of the number of channels corresponding to the diameter of the microchannel ( D N {D_{N}}) using an entropy generation minimization approach is achieved for the MCHS used in electronic applications. The numerical study is performed for constant total heat flow rate ( q ˙ t o t )({\dot{q}_{tot}}) and total mass flow rate ( m ˙ t o t )({\dot{m}_{tot}}). The results indicate that the dominance of frictional entropy generation ( S g e n , F r {S_{gen,Fr}}) increases with the reduction in diameter. However, the entropy generation due to heat transfer ( S g e n , H T {S_{gen,HT}}) decreases with the reduction in diameter. Therefore, the optimum diameter ( D ∗ {D^{\ast }}) is calculated corresponding to the minimum total entropy generation ( S g e n , t o t a l {S_{gen,total}}) for the optimum number of channels ( N ∗ {N^{\ast }}). Furthermore, the entropy generation number ( N S {N_{S}}) and Bejan number ( B eBe) are also calculated.

中文翻译：

---

使用熵生成最小化方法优化圆形微通道散热器

摘要 微通道散热器（MCHS）在电子应用中的性能需要根据通道数（N）进行优化。在这项研究中，对于电子应用中使用的 MCHS，使用熵生成最小化方法实现了对应于微通道直径 (DN {D_{N}}) 的通道数量的优化。数值研究针对恒定总热流率 ( q ˙ tot )({\dot{q}_{tot}}) 和总质量流率 ( m ˙ tot )({\dot{m}_{tot} })。结果表明摩擦熵产生的优势（S gen , F r {S_{gen,Fr}}）随着直径的减小而增加。然而，由于传热产生的熵 (S gen , HT {S_{gen,HT}}) 会随着直径的减小而减少。所以，最佳直径 ( D ∗ {D^{\ast }}) 的计算对应于最佳通道数 ( N ∗ {N^) 的最小总熵生成 ( S gen , total {S_{gen,total}}) {\ast }}）。此外，还计算了熵生成数（NS {N_{S}}）和贝扬数（B eBe）。