圓形微流道與嵌入物對混合特性之影響

A Study on the Mixing Characteristics in Circular Type Micro-channel with Embedded Baffles

鐘彥允(Yen-Yun Chung)

指導教授 ： 魏哲弘

大同大學/工程學院/機械工程學系所/碩士(2011年)

摘要

本文所研究的是一款包覆式結構混合器，結構是由傳統T型流道，做一些結構上的改良及變化，在結構上的設計主要是考量增加流體之間的接觸面積方式來提升混合器之混合效率，利用圓形流道中的結構讓流體分成兩邊，目的是要包覆流體的方式來增加混合效率。透過有限元素模擬分析軟體（COMSOL Multiphysics）進行各種數值的模擬與計算，探討改良之後的結構對混合效率是否有影響。
經分析之後發現，改良的包覆式流道結構混合器，其混合效率相當好，當流道內無任何阻礙物時，混合效率比T型混合器的效能提升了47% 左右。另外，於流道嵌入阻塊及改變阻塊缺口角度之後，在混合效率也從原先75% 提升至98% 左右。因此，在流道內嵌入阻塊對混合效率而言，確實可以達到最有效的混合機制，可見此種結構的流道設計，對後續微混合器的研究有一定程度上的幫助。

關鍵字

圓形微流道 ； 微混合器

並列摘要

Mixing is an important topic in microfluidics. Conventional T-type passive microchannel is not efficient in mixing. In this work, we employ a circular-type channel with embedded baffles to increase the contact area, change the flow pattern and enhance mixing efficiency. The channel design is evaluated based on the numerical simulation by a finite element program (Comsol Multiphysics ).
With no baffles, the simulations predicate the circular-type microchannel increase 47% compared to T¬-ype channel. With embedded baffles, the mixing efficiency can be as high as 98% compared to T-type channel with baffles. This demonstrates that with increase of contact area (circular-type) as well as flow pattern change (baffles), the mixing efficiency can greatly improve.

並列關鍵字

Circular Microchannel ； Micromixer

參考文獻

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