KARAKTERISTIK ALIRAN TAYLOR SISTEM GAS-LIQUID DALAM MICROCHANNEL BERPENAMPANG LINGKARAN

Miniaturization performs better than conventional equipment since it can generate a high specific surface (A/V) for mass and heat transfer between phases. The current studies aimed at characterizing the two-phase flow pattern (air-methanol) with a circular cross-sectional area of silicone, determining bubble length in the inlet and outlet section by using the three configurations of microchannel; finding the effect of gas and liquid velocity as well as the pressure drop throughout the channel to the bubble dimensions formed. The experiments were conducted by visualizing a gas-liquid flow pattern (Taylor) and measuring the bubble length within a channel of 1 mm ID. As a flow pattern target in this work, Taylor has a uniform shape, dimension, and constant velocity during observations. An increase in the ratio of linear velocity (UG/UL) brings on an increase in bubble length throughout the channel from the inlet to the outlet section. The bubble length outlet is longer than the inlet section due to the effect of increasing pressure drop (ΔP) and is sometimes caused by the bubble coalescence phenomena. The wettability on the inner wall of the microchannel strongly determined the flow pattern type and the length of bubbles