A unique solution for preventing clogging of flow channels by gas bubbles

被引：25

作者：

Kohnle, J ^{[1
]}

Waibel, G ^{[1
]}

Cernosa, R ^{[1
]}

Storz, M ^{[1
]}

Ernst, H ^{[1
]}

Sandmaier, H ^{[1
]}

Strobelt, T ^{[1
]}

Zengerle, R ^{[1
]}

机构：

[1] HSG, IMIT, D-78052 Villingen Schwenningen, Germany

来源：

FIFTEENTH IEEE INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS, TECHNICAL DIGEST | 2002年

关键词：

D O I：

10.1109/MEMSYS.2002.984094

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel solution is presented that deals with the well known problem of clogging in microfluidic channels caused by gas bubbles. The presented approach involves the use of a single channel with different, parallel cross sections. In each of these cross-sections different capillary forces act on the fluid and on potentially present bubbles. The latter are drawn into one of the cross sections, depending on their geometry and wetting behaviour, allowing a bypass, Le, an ongoing, increased flow in the remaining available cross sections. The resulting drag on the bubble, caused by this flow, increases its mobility. In our experiments for low pressure differences the flow is increased by a factor of 4 and the mobility of the gas bubbles was increased by a factor of approximately 6 as compared to a conventional channel. This method greatly reduces the system susceptibility to clogging.

引用

页码：77 / 80

页数：4