Numerical study of pressure drops and flow characteristic in high temperature air-water stratified flow using the AIAD model

Eli Kumolosari, Bahrul Jalaali

Submitted : 2022-09-20, Published : 2022-11-01.


In geothermal power plant systems, two-phase flow measurement is very important for the management and control of different processes. Two of the important parameters in two-phase flow are the flow regime (flow pattern) and pressure drop. In this study, high temperature air-water pressure drop and flow regime were investigated numerically, as a basic study of two-phase phenomena in geothermal power plant, using AIAD model. The vapor and water superficial velocities were ranged at 3.9 – 6.6 m/s and 0.013-0.022 m/s, respectively. The computational domain was adjusted on a horizontal pipe with 255mm in diameter and 8000mm in length while the temperature and inlet pressure condition were set to 433K and 6bar. The simulation results showed a good agreement on predicting flow regime compared with the flow regimes that obtained experimentally by previous work whereby stratified and wavy flow were clearly observed. The results are beneficial to enhance the understanding of flow characteristics regarding geothermal wells and their potential power which is important to the investigation on geothermal industry


Ini Dia Sebaran Pembangkit Listrik Panas bumi di Indonesia. ESDM. (n.d.). Diakses pada 26/01/2022 pukul 15.22 WIB, dari

Hackstein, F. V., and Madlener, R., “ Sustainable operation of Geothermal Power Plants: Why Economics Matters” , Geothermal Energy, 9(1), 2021, doi : 10.1186/s40517-021-00183-2

Kabeyi, M. J., and Olanrewaju, O. A. , “Central versus wellhead power plants in geothermal grid electricity generation”, Energy, Sustainability and Society, 11(1), 2021, doi : 10.1186/s13705-021-00283-8

Wang, D., Shi, S., Fu, Y., Song, K., Sun, X., Tentner, A., and Liu, Y., “ Investigation of air-water two-phase flow characteristics in a 25.4 mm diameter circular pipe”, Progress In Nuclear Energy, 138, 103813, 2021, doi : 10.1016/j.pnucene.2021.103813

Zhang, Y., He, C., and Li, P., “Numerical investigation of gas-liquid two-phase flow in horizontal pipe with orifice plate”, Progress In Nuclear Energy, 138, 103801, 2021, doi : 10.1016/j.pnucene.2021.103801

Feng, K., and Zhang, H., “ Pressure drop and flow pattern of gas-non-newtonian fluid two-phase flow in a square microchannel”, Chemical Engineering Research and Design, 173, 158-169, 2021, doi : 10.1016/j.cherd.2021.07.010

Helbig, S.,and Zarrouk, S., “Measuring two-phase flow in geothermal pipelines using sharp edge orifice plates”, Geothermics, 44, 52-64, 2012, doi : 10.1016/j.geothermics.2012.07.003

Brennen, C. ,” Fundamentals of multiphase flow”, Cambridge, UK: Cambridge University Press, 2005, doi : 10.1017/CBO9780511807169

Shi, X., Dong, F., and Tan, C.,“Horizontal oil-water two-phase flow characterization and identification with pulse-wave ultrasonic Doppler technique”, Chemical Engineering Science, 246, 117015, 2021, doi : 10.1016/j.ces.2021.117015

Shao, J., Li, X., Guo, Z., Ma, T., Liu, R., and Tian, X.,“Flow pattern, pressure drop and heat transfer coefficient during two-phase flow boiling of R134a in pump-assisted separate heat pipe”, Experimental Thermal and Fluid Science, 85, 240-247, 2017, doi : 10.1016/j.expthermflusci.2017.03.007

Yegorov, Y. "Contact condensation in stratified steam-water flow". EVOLECORA-D 07, 2004.

Deendarlianto, M. Andrianto, A. Widyaparaga, O. Dinaryanto, Khasani, Indarto, "CFD Studies on the gas-liquid plug two-phase flow in a horizontal pipe", Journal of Petroleum Science and Engineering, Volume 147, Pages 779-787, 2016, doi : 10.1016/j.petrol.2016.09.019

Deendarlianto, T. Höhne, P. Apanasevich, D. Lucas, C. Valle^'e, M. Beyer, “Application of a new drag coefficient model at CFD-simulations on free surface flows relevant for the nuclear reactor safety analysis”, Annals of Nuclear Energy, 39, pp 70-82, 2012, doi : 10.1016/j.anucene.2011.09.010

T. H hne, P. Porombka, S. M. S ez,“ Validation of AIAD sub-models for advanced numerical modelling of horizontal two-phase flows”, Fluids, 5, 102, 2020, doi : 10.3390/fluids5030102

T. H hne, A. Rayya, G. Montoya, “Numerical modelling of horizontal oil-water pipe flow”, energies, 13, 5042, 2020, doi : 10.3390/en13195042

D. C. Wilcox, “Turbulence Modelling for CFD”, DCW Industries Inc.: La Cañada, CA, USA, 1994

ANSYS® Fluent, “Fluent Theory Guide 2013”, USA: ANSYS Inc

H. Palsson, E. S. Bergborsson, O.P. Palsson,“Estimation and validation of models of two phase flow from geothermal wells”, The 10th international symposium on district hearing and cooling, University of Iceland, 2006

O. Baker, “Design of pipe lines for simultaneous flow of oil and gas”, Oil and Gas J., 53:185-190, 1954, doi : 10.2118/323-G

M. H. Mubarok, J. E. Cater, S. J. Zarrouk,“Comparative CFD modelling of pressure differential flow meters for measuring two-phase geothermal fluid flow”, Geothermics 86, 2020, doi : 10.1016/j.geothermics.2020.101801

H. D. Zhao, K. C. Lee, D. H. Freeston, “Geothermal two-phase flow in horizontal pipes”, Proceeding world geothermal congress 2000, pp. 3349-3353, 2000

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