4221 マイクロチャンネル内気液二相流のボイド率と気泡寸法分布の光学的計測(G05-12 気泡・液滴(1),G05 流体工学)  [in Japanese] 4221 Optical Measurement of Void Fraction and Bubble Size Distributions in A Microchannel  [in Japanese]

An optical measurement system was developed to investigate gas-liquid two-phase flow characteristics in a circular microchannel of 100μm diameter. By using multiple optical fibers and infrared photodiodes, void fraction and gas plug and liquid plug lengths, and their velocities were measured successfully. The probes responded to the passage of gas and liquid phases through the microchannel adequately so that the time-average void fraction could be obtained from the time fraction for each phase.