KAJIAN EKSPERIMENTAL ALIRAN MULTI KOMPONEN (UDARA, AKUADES 27%, GLISERIN 70%, BUTANOL 3%) PADA PIPA MINI DENGAN KEMIRINGAN 20 DERAJAT TERHADAP HORIZONTAL

Two-phase flow is part of multiphase flow, where the phase is the state, form or shape of a substance, which can be solid, liquid, or gas. Two-phase flow involves only two forms of a substance contained in a flow and can be grouped based on the size of the channel, namely, large pipes (large channels), normal (normal channels), mini (mini channels), micro (micro channels), and even on nano channels. The purpose of the research on experimental study of multi-phase gas flow – a mixture of 23% distilled water, 70% glycerin, 3% butanol in a mini pipe is to obtain primary data on flow pattern characteristics, flow pattern map, vacuum fraction, and pressure gradient in a mini pipe with a slope. 20 degrees to the horizontal so that later it can be used as a reference in the development of science and technology. This research was conducted on a sectional test in the form of a glass pipe with a diameter of 1.6 mm with a length of 130 mm with a tilt angle of 20⁰ to the horizontal position. The fluid used is a mixture of air, 23% distilled water, 70% glycerin, and 3% butanol. The superficial velocity values of water and air are varied, namely JL = 0.033 – 4.93 m/s and JG = 0.025 – 66.3 m/ S. Characteristic data of flow pattern and void fraction were taken using a high speed camera with a speed of 1200 FPS. In the study the flow pattern is processed using the visualization method with the MP4 to MPEG program then processed with virtualdub. The void fraction is calculated using a digital image processing method with the MATLAB R2014a program, while the gradient uses an MPX System fluid pressure sensor that utilizes a USB-4704 which is then attached to a computer so that the pressure data contained in the pipe is obtained. The flow patterns obtained include: plug, slug annular, annular, disperse bubble and churn. The difference in fluid properties used in each study will have the effect of shifting the flow pattern map, which is the higher the viscosity, churn pattern and bubble dispersal. The increase in JG and JL has an important role in the value of the Void fraction and pressure gradient.