| Summary: | 碩士 === 逢甲大學 === 化學工程學所 === 94 === Valving is an important function in the microfluidics since it provides the ability to control the fluid flow and eventually leads to automation. Capillary valving is the most popular type of valving since it is low cost and also provides good air venting. In our study of capillary valving, it is found that in addition to the geometry of the valving design, the static friction in the micro-chamber also plays important roles. A series of experiments were carried out to study the effect of friction in the micro-chamber using a “liquid bridge” model. It is found that factors such as surface tension, contact angle, distance between two parallel disks and volume of liquid affect the friction in the micro-chamber.
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