KAJIAN EKSPERIMENTAL ALIRAN MULTI KOMPONEN (UDARA, AQUADES 25%, GLISERIN 70%, BUTANOL 5%) PADA PIPA MINI DENGAN KEMIRINGAN 20 DERAJAT TERHADAP HORISONTAL

Two-phase flow is generally a subset of multiphase flow, in which the flow
has several phases flowing simultaneously. Currently, these flows can be found in
nature (fog, rain, clouds, snow and so on) as well as in the industrial world (nuclear
reactors, pipelines, geothermal , etc. ), medicine (blood flow in veins) and in life.
Daily (sewer on the sink and so on). Research and investigations on two - phase
flow in mini - sized pipes have been started for a long time and are still being
developed. This study aims to determine the characteristics of two-phase flow (air
with a mixture of 25% distilled water, 70% glycerin, and 5% butanol) in a mini pipe
with a slope of 20° to the horizontal.
Research was conducted on sex i test in the form of 1.6 mm diameter glass
pipe with a slope angle of 20 ⁰ to the horizontal position. The fluid used is air - a
mixture of 25% distilled water, 70% glycerin and 5% butanol. The superficial
velocity values of liquid and air were varied, namely J L = 0.033 – 4.935 m / s and
J G = 0 – 66.3 m / s . Characteristic data of flow patterns and void fractions were
taken using a high speed camera with a speed of 1200 fps. In this study the flow
pattern is processed using a method of visualizing the program M OV to AVI then
treated with VirtualDub . The void fraction was calculated 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.
These two-phase flow characteristics include flow patterns, void fractions
and pressure gradients. The result of this research is that the flow patterns are:
plug, bubbly , slug annular, annular , and churn . The flow pattern map obtained
in this study is more dominant in the slug-annular and plug flow patterns . The
value of the void fraction is influenced by the varying J G and J L and the flow
pattern that occurs, where the void fraction value is directly proportional to the J
G value but inversely proportional to the J L value . Results gradient pressure
indicates that the gas superficial velocity (J G ) and the superficial velocity of liquid
(J L ) greatly affect the value of the pressure gradient, where the higher the value
of J G and J L then the value of the pressure gradient will increase