本實驗設計了不同幾何形狀的被動式微混合器，採用電滲驅動的方式推動流體 (0.027 ≤ Re ≤ 0.081)，利用微質點影像測速儀 (MPIV) 量測微混合器內的速度場分布，並分析相關的物理現象，藉以判別與混合優劣的關係。以優碘與去離子水的混合實驗作為定性分析，並經由工具顯微鏡拍攝流場可視化；而藉由 rhodamine B與緩衝液混合實驗進行流場可視化與定性分析，以微雷射誘發螢光技術 (μLIF) 量測濃度場的分布情形，並分析混合效率的好壞。實驗結果顯示，Twr與Tcdr型的微混合器能產生混沌流，有效的提升混合品質。最後，將影響混合長度的相關參數，整理成一關係式 ，而此關聯式預測值與實驗值之誤差在10%以內。

Experiments were investigated on passive mixing enhancements in different geometric microchannels with roughened surfaces and flow was driven by electroosmotic flow (0.027 ≤ Re ≤ 0.081). Experiments were perform using micro particle image velocimetry (MPIV) technology for velocity measurements and relative analysis. Iodine and DI water mixing experiments were captured by common optical microscope for flow visualization, and rhodamine B and buffers mixing experiments were measured by micro laser-induced fluorescence (µLIF) technology for concentration field measurements and analysis. The experimental results showed that the Twr and Tcdr micromixers can generate chaotic flow and enhance the mixing performance in the short channel length. Finally, the mixing length was developed in terms of within accuracy between the experimental data and prediction data.

目 錄

頁次
目錄............................................................................................................ i
表目錄...................................................................................................... iv
圖目錄....................................................................................................... v
符號說明................................................................................................ viii
中文摘要................................................................................................... x
英文摘要.................................................................................................. xi


第一章 緒論......................................................................................... 1
1-1 前言.......................................................................................... 1
1-2 混合器種類.............................................................................. 2
1-3 被動式混合機制...................................................................... 3
1-4 布朗運動.................................................................................. 4
1-5 電滲現象.................................................................................. 5
1-6 實驗背景與目的...................................................................... 6
1-7 文獻回顧.................................................................................. 6

第二章 實驗設備系統....................................................................... 13
2-1 MPIV與μLIF系統................................................................ 13
2-2 實驗設備................................................................................ 14
2-3 製程設備................................................................................ 15
2-4 相關設備................................................................................ 16

第三章 實驗方法及步驟................................................................... 28
3-1 微混合器製程........................................................................ 28
3-1-1 微混合器製作.................................................................28
3-2 螢光質點、螢光染劑與緩衝液配製...................................... 30
3-3 光學顯微鏡量測系統建立與分析方法................................ 31
3-4 MPIV與μLIF量測系統建立與分析方法............................ 32

第四章 理論分析............................................................................... 44
4-1 Einstein-Smoluchowski 方程式............................................ 44
4-2 雷諾數.................................................................................... 44
4-3 培克數.................................................................................... 45
4-4 拉伸率.................................................................................... 45
4-5 混合效率................................................................................ 45
4-6 參數分析................................................................................ 46

第五章 誤差分析............................................................................... 48

第六章 結果與討論........................................................................... 52
6-1 優碘與去離子水的混合........................................................ 52
6-2 速度向量................................................................................ 52
6-3 側向速度分析........................................................................ 53
6-4 濃度場觀測與分析................................................................ 54
6-5 關係式建立............................................................................ 55

第七章 結論與建議........................................................................... 72
7-1 結論........................................................................................ 72
7-2 建議與改進............................................................................ 73

參考文獻................................................................................................. 74
附錄A...................................................................................................... 80

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