交錯彎曲微流道和Y 型凹槽微流道之混合性能

Mixing Performance of Staggered Curved Microchannels and Y-Type Grooved Microchannels

謝獻瑞(Shian-Reui Shie)

指導教授 ： 陳志堅

國立屏東科技大學/工學院/生物機電工程系所/碩士(2011年)

https://doi.org/10.6346/NPUST.2011.00208

摘要

本論文探討流體在交錯彎曲微流道與Y型具有凹槽微流道內，因結構設計使流體產生擾動的流場現象，交錯彎曲流道具有離心力產生的丁恩渦流來使流場擾動，更因分岔與再結合的幾何流道設計使流體分裂與重組，有效的減少分子間的擴散距離。使用共軛焦顯微鏡所拍攝的螢光染劑在流道內的分佈截面圖和墨水及pH指示劑所拍攝的流體混合情形做驗證，可證明出兩股流體因彎曲的流道設計在高流速下產生的強大離心力，使兩股流體不斷的交換位置，分岔與再結合的流道幾何設計也使流體互相的分裂與疊加，更有效的使兩股流體混合。Y型具有凹槽微流道中，使用墨水來分析結構對流體產生擾動的流場現象，微流道內的凹槽能使流體順著凹槽移動，單方向傾斜的凹槽可使流體產生很強的側流作用，流體接觸到壁面後會產生迴流的現象，具有雙方向傾斜的凹槽，可使流體產生雙方向的側流作用使流體在流道內產生兩股不同方向的渦漩。

關鍵字

彎曲微流道 ； 丁恩渦流 ； 離心力 ； 凹槽微流道 ； 側流作用

並列摘要

This paper examines the micro-fluid flow in the staggered curved Y-shaped with a groove with micro-flow as a result of structural design allows fluid to produce the phenomenon of disturbance of the flow field, flow with a staggered curved centrifugal force generated Dingen vortex flow field to the disturbance, more because of the bifurcation geometry with the combined fluid flow channel design and re-split, effectively reducing the diffusion distance between molecules. Confocal microscope using the fluorescent dye in the film within the flow channel of distribution sections and ink, and pH indicator fluid mixed case taken to do validation, to prove that the two shares of fluid flow due to the curved design of the high velocity produced under a strong centrifugal force, so that the two continue to exchange shares of the location of fluid, Bifurcation and combined with the flow of fluid geometric design also split and superimposed with each other, so that the two share more effective fluid mixing. Y-shaped microfluidic channel in a groove, used to analyze the structure of the ink result in disturbances of the fluid flow phenomena, micro-flow of fluid within the groove can move along the groove, the groove can tilt in one direction produces a very fluid the role of strong side-stream, the fluid will have access to the back wall of the phenomenon, with both sides to the tilt of the groove, the two sides to allow fluid to produce the side effect of the fluid flow is generated in the flow direction of two different vortex.

並列關鍵字

Dingen vortex ； centrifugal force ； vortex flow ； Grooved ； Microchannels

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