Abstract
The field of microfluidics is developing rapidly with advances in MEMS (micro electro mechanical system) and μTAS (micro total analysis system) technologies. In various devices, controlling the flow rate of liquid or gas accurately at micro or nanoliter volumes is required. We have examined the gas-liquid two-phase flow patterns in a microchannel T-junction. The two-phase flow patterns were observed in the T-junction under two different gas and liquid injection conditions. The flow patterns of liquid and gas in the microchannel after the T junction were observed and a two-phase map was constructed. The flow patterns could be classified into three types depending on the flow rate.
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