Nano Science and Technology Institute
MSM 2000
MSM 2000
Technical Proceedings of the 2000 International Conference on Modeling and Simulation of Microsystems
Chapter 13: Applications: Microfluidics

Pneumatic Regulation of Bi-Directional Fluid Flow in Microchannels

Authors:Y-M. Wan, N-K. Yao, C. Chen, L-Y. Hung and S-H. Wang
Affilation:ITRI, TW
Pages:558 - 561
Keywords:pneumatic control, single direction airflow, two-way fluid flow, biochip
Abstract:This paper presents a modeling of airflow inside micro-tunnel for fluid pumping. By utilizing unidirectional air servo system, fluid flow can be regulated within microchannels. The operation of servo system is controlled with multiple nozzles. Pressure variations lead to two fundamental operational modes: "suction" and "exclusion" in channels. Three-dimensional finite volume simulations are tested to demonstrate that operation mechanism for suction is via the generation of a reverse airflow, while exclusion is obtained without the reverse airflow.
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