Fajarningrum, N. D, - and Samsudin Anis , Teknik Mesin Unnes and Karnowo,, - and Maulana, S, - (2017) Effect of Superficial Velocity on the Characteristics and Parameters of Plug Flow Pattern in a Horizontal Pipe. In: Mini Symposium Proceeding: Education, Concept, and Application Green Technology, 11 Oktober 2017, Semarang.

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Abstract

In a two-phase gas-liquid flow, as part of an intermittent flow, has many flow pattern phenomena. The flow pattern occurs because differential superficial velocity of gas and liquid, and also the pressure fluctuation. Therefore, the study about plug flow is very important to obtain its parameters and characteristic data. Image processing method was applied to obtain the parameters, and characteristic of plug flow. In this experiment, horizontal transparent acrylic pipes with internal diameter of 19 mm was applied. A highspeed video camera (400 frame per seconds) was also used to visualize the pattern. Those observed videos were converted by Aisesoft Total Video Converter. After that the videos were changed into images with VirtualDub to analyze the parameters and characteristic of plug flow. The parameters of plug flow includes liquid superficial velocity and gas superficial velocity fraction whereas the wave characteristics consists of wave velocity and wave frequency. The results showed that a more apparent gas-liquid interface could be determined through this technique and the pattern of plug flow was also explained with the characteristics. The present results were also supported by the available previous studies.

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