A void fraction of high-viscosity air-water flow in capillary pipes with a slope of 30 degrees to the horizontal positio

Authors

  • Sukamta Sukamta Department of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta
  • Metra Prayogi Rianda Universitas Muhammadiyah Yogyakarta
  • Sudarja Sudarja Universitas Muhammadiyah Yogyakarta

DOI:

https://doi.org/10.24127/trb.v8i2.1054

Abstract

Two-phase flow is a flow that is composed of several combined substances, namely liquid and gas. Two-phase flow is found in industrial processes, such as in boiler systems, reactors, heat exchangers, geothermal and others. The phenomenon of two-phase flow is also often found in nature, such as fog, snow, clouds, and rain. The purpose of this study was to obtain the characteristics, length, and frequency of flow patterns in two phases based on the experimental value of the fraction in a two-phase flow of a mixture of water-glycerin and air in a capillary tube with a slope of 30˚. The study used a 1.6 mm diameter capillary tube with a working fluid which mixed air and water mixed with glycerin with glycerin concentrations of 40%, 50%, 60%, and 70%. Void fraction values were analyzed using digital image processing methods with the MATLAB R2014a application program. The results showed that the void fraction value was determined by the surface velocity of the liquid and air. The greater the superficial air velocity, the value of the vacuum fraction will develop, while the greater the superficial velocity of the liquid, the vacuum fraction will decrease. The flow pattern of bubbles and plugs is strongly influenced by fluid viscosity. Therefore the higher the viscosity, the velocity of the bubble and plug flow patterns will decrease, conversely if the viscosity of the fluid decreases, the velocity of the bubble and plug flow patterns will increase. The length and flow of the bubble pattern are strongly influenced by homogeneous values (β). If the homogeneous value (β) is higher then the length of the flow pattern will increase. In the stopper flow pattern obtained a high enough frequency, it will produce a high enough void fraction value. Keywords: Two-phase, fluid, void fraction, viscosity, flow pattern.

Author Biography

Sukamta Sukamta, Department of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta

https://orcid.org/0000-0001-9792-3087

References

[1] G. Wallis, “One-dimensional twophase flow,” 1969. [2] M. I. Ali, M. Sadatomi, and M. Kawaji, “Adiabatic two‐phase flow in narrow channels between two flat plates,” Can. J. Chem. Eng., vol. 71, no. 5, pp. 657–666, 1993. [3] T. Fukano and Akira Kariyasaki, “Characteristics of Gas -Liquid TwoPhase Fow in a Capillary Tube,” vol. 141, no. Nuclear Engineering and Design, pp. 59–68, 1993. [4] Nicklin, D.J., Wilkes, J. and Davidson, J.F., 1962, “Two-phase Flow in Vertical Tubs”, Trans. Inst. Chem. Engng, Vol.40, pp61-68 [5] K. A. Triplett, S. M. Ghiaasiaan, S. I. Abdel-Khalik, A. LeMouel, and B. N. McCord, “Gas-Liquid Two-Phase Flow in Microchannels Part II: Void Fraction and Pressure Drop,” Int. J. Multiph. Flow, vol. 25, no. 3, pp. 395–410, 1999. [6] A. Sur and D. Liu, “Adiabatic airewater two-phase flow in circular microchannels,” Int. J. Therm. Sci., vol. 53, pp. 18–34, 2012. 7 Serizawa, Z.P. Feng, Z. Kawara, Two-phase flow in microchannels, Experi- mental Thermal and Fluid Science 26 (2002) 703e714
TURBO p-ISSN: 2301-6663, e-ISSN: 2447-250X Vol. 8 No. 2. 2019 193
[8] P. M. Y. Chung and M. Kawaji, “The effect of channel diameter on adiabatic two-phase flow characteristics in microchannels,” Int. J. Multiph. Flow, vol. 30, no. 7-8 SPEC. ISS., pp. 735–761, Jul. 2004. [9] Sudarja, Indarto, Deendarlianto, and A. Haq, “Experimental study on the void fraction of air-water two-phase flow in a horizontal circular minichannel,” AIP Conf. Proc., vol. 1737, 2016. [10] Sudarja, Deendarlianto, Indarto, and H. Aqli, “Experimental Study on the Void Fraction of Air-Water TwoPhase Flow in a Horizontal Circular Mini-Channel,” in AIP Conference Proceeding. (2015). [11] S. Saisorn and S. Wongwises, “Flow Pattern, Void Fraction and Pressure Drop of Two-Phase Air-Water Flow in a Horizontal Circular MicroChannel,” Exp. Therm. Fluid Sci., vol. 32, no. 3, pp. 748–760. (2008). [12] Mayor, T.S., Pinto, A.M.F.R., Campos, J.B.L.M., 2007, An Image Analysis Technique for The Study of Gas-Liquid Slug Flow along Vertical Pipes – Associated Uncertainty, Flow Measurement and Instrumentation, Vol 18, pp. 139-147. [13] Sukamta, Aldi Rahadian Ilham, Sudarja, 2019, The Investigation Of Void Fraction Of Two-Phase Flow Air-Water And Glycerine (0-30%) In The Capillary Pipe With Slope Of 50 To Horizontal Position, Media Mesin, vol. 20. No. 1. Pp. 8-17. [14] Sukamta, Sudarja, 2019, Korelasi Signifikan antara Kecepatan Superfisial dan Viskositas Cairan Menggunakan Pola Aliran Dua Fase pada Pipa Mini dengan Kemiringan 30o, TURBO Vol. 8 No. 1. 2019.

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Published

2020-07-02

Issue

Vol. 8 No. 2 (2019): Jurnal Turbo Desember 2019

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