本文選題：分合式微混合器 + 混沌對(duì)流　； 參考：《中國(guó)機(jī)械工程》2017年23期

【摘要】：按照混沌混合理論構(gòu)建了Smale、Helical和Baker三種微混合器,為研究其混合機(jī)理與混合效果,對(duì)不同雷諾數(shù)下的對(duì)流擴(kuò)散和混合進(jìn)行了數(shù)值模擬,并用實(shí)驗(yàn)結(jié)果進(jìn)行了驗(yàn)證。結(jié)果發(fā)現(xiàn):實(shí)驗(yàn)結(jié)果與數(shù)值模擬結(jié)果吻合得很好。在低雷諾數(shù)下,由于Baker微混合器中流體的分層作用強(qiáng),明顯增大了流體的接觸面積,也加快了流體混合速度,其混合效果要明顯優(yōu)于另外兩種混合器;然而,在較大的雷諾數(shù)下,Smale微混合器中流體混合效果則優(yōu)于Baker微混合器,其原因是Smale微混合器的分層效果雖然不如Baker微混合器,但其對(duì)流作用明顯強(qiáng)于Baker微混合器;Helical微混合器因沒(méi)有分層作用,其混合主要依賴于對(duì)流,所以在低雷諾數(shù)下混合性能較差,而高雷諾數(shù)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.
【作者單位】： 杭州電子科技大學(xué)機(jī)械工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(11572107,51376055)
【分類號(hào)】：TQ051.71
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本文編號(hào)：1902556