基于混沌混合的分合式微混合器研究

发布时间：2018-05-17 19:25

  本文选题：分合式微混合器 + 混沌对流　； 参考：《中国机械工程》2017年23期

【摘要】：按照混沌混合理论构建了Smale、Helical和Baker三种微混合器,为研究其混合机理与混合效果,对不同雷诺数下的对流扩散和混合进行了数值模拟,并用实验结果进行了验证。结果发现:实验结果与数值模拟结果吻合得很好。在低雷诺数下,由于Baker微混合器中流体的分层作用强,明显增大了流体的接触面积,也加快了流体混合速度,其混合效果要明显优于另外两种混合器;然而,在较大的雷诺数下,Smale微混合器中流体混合效果则优于Baker微混合器,其原因是Smale微混合器的分层效果虽然不如Baker微混合器,但其对流作用明显强于Baker微混合器;Helical微混合器因没有分层作用,其混合主要依赖于对流,所以在低雷诺数下混合性能较差,而高雷诺数下混合性能有所提高。
[Abstract]:According to chaotic mixing theory, three kinds of micromixers, SmaleHelical and Baker, are constructed. In order to study their mixing mechanism and mixing effect, the convection diffusion and mixing at different Reynolds numbers are numerically simulated, and the experimental results are verified. The results show that the experimental results are in good agreement with the numerical simulation results. At low Reynolds number, due to the strong stratification of the fluid in the Baker micromixer, the contact area of the fluid is obviously increased and the mixing speed of the fluid is also accelerated. The mixing effect is obviously superior to that of the other two mixers. The effect of fluid mixing in Smale micromixers is better than that in Baker micromixers at large Reynolds number. The reason is that the stratification effect of Smale micromixers is not as good as that of Baker micromixers. But its convection effect is obviously stronger than that of Baker micromixer, and its mixing is mainly dependent on convection because it has no stratification effect, so its mixing performance is poor at low Reynolds number, but the mixing performance is improved at high Reynolds number.
【作者单位】： 杭州电子科技大学机械工程学院;
【基金】：国家自然科学基金资助项目(11572107,51376055)
【分类号】：TQ051.71
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本文编号：1902556