Air- Low Viscosity Water Two-Phase Flow Pattern in 5 Degrees Slope of the Capillary Pipe
Sukamta; Ade Yoga Pratama; Sudarja
Mechanical Engineering Department, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta
Abstract
The investigation of two-phase flow in mini or capillary pipes becomes very important since it is used in various applications such as x-ray, heat exchanger, geothermal piping systems, boilers, oil, and gas. Furthermore, its application in biomedicine comprising the cardiovascular system which is blood circulation that is made up of the heart, blood vessels and the blood that circulates throughout the body. Along with the widespread application of two-phase flow, more in-depth research of two-phase flow is required by performing a variety of methods to find out its effect on characteristics of the two-phase flow and its application in biomedics. The research was carried out using experimental methods, with an inner pipe diameter of 1.6 mm and length of 130 mm. The test section with a slope of 5 degrees against the horizontal position. The working fluid being used were air and water mixed with Glycerin at concentrations of 0%, 10%, 20%, 30% for each blend, and varying the superficial water and gas velocity in the range of JL = 0.033 to 4.935 m/s and JG = 0.025 to 66.3 m/s. The research was done by the method of visualization using high-speed cameras. The research found five types characteristics of flow pattern i.e.: bubbly, plug, slug annular, annular and churn. The plug flow pattern dominates the result in this study, viscosity changes effect can be seen on the bubbly and plug flows as well as on the transition flow pattern. Flow pattern formed later are mapped based on superficial velocity variation. Map of the flow pattern is also compared to the results of previous research and it has resulted the conformity.
Keywords: annular, bubbly, gas, liquid, superficial, velocity.
Topic: International Symposium of Engineering, Technology, and Health Sciences