KAJIAN EKSPERIMENTAL ALIRAN MULTI KOMPONEN (UDARA, AQUADES 27%, GLISERIN 70%, BUTANOL 3%) PADA PIPA MINI DENGAN KEMIRINGAN 40 DERAJAT TERHADAP HORISONTAL

Two-phase flow (two-phase flow) is part of a multi-phase flow that involves
only two kinds of state of a substance in a flow. Two-phase flow can be
distinguished based on the size of the channel, namely, large channel (large
channel), normal (normal channel), mini (minni channel), micro (micro channel),
nano (nano channel). This study aims to find out information about flow patterns,
flow pattern maps, void fraction and pressure gradient of two-phase flow in the
mini-channel.
This research was conducted in the test section in the form of a mini glass
pipe with a diameter of 1.6 mm with a length of 130 mm with a tilt angle of 40⁰ to
the horizontal position. The fluid used is a mixture of air, 27% distilled water, 70%
glycerin and 3% butanol. The superficial velocity values of water and air are
varied, namely JL = 0.033 – 4, 958 m/s and JG = 0.025 – 66,618 m/s. In this study,
data on flow pattern characteristics and void fraction were taken using a highspeed camera with a speed of 1200 fps. The flow pattern data is processed using
the visualization method with the MOV to AVI program and then processed with
virtual dub. The void fraction was processed using a digital image processing
method with the MATLAB R2014a program. The pressure gradient uses an MPX
System fluid pressure sensor connected to a computer. In this study, the flow
patterns obtained were: plug, bubbly, slug annular, annular, and churn.
The results obtained on the flow pattern map are dominated by plug and
slug annular flow patterns. The results of the void fraction research show that the
higher the value of JG, the greater the value of the void fraction, while the higher
the value of JL, the value of the void fraction decreases. The results of the pressure
gradient show that the superficial gas velocity (JG) and liquid superficial velocity
(JL) greatly affect the pressure gradient value, the higher the JG and JL values, the
higher the pressure gradient value will be. The value of surface tension, viscosity,
and slope angle affect the shape of the flow pattern and the value of the pressure
gradient. This study aims to determine the characteristics of the liquid to the results
obtained which will be compared with research that has been done but has several
different parameters.