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Russia Kazan
Section  Mechanics 
Title  Study of the effect of the gas phase on the structure of turbulent flow and friction in the stream of a watergas mixture in a vertical pipe 
Author(s)  Snigerev B.A.^{a} 
Affiliations  Institute of Mechanics and Engineering, Kazan Science Center of the Russian Academy of Sciences^{a} 
Abstract  The results of numerical simulation of the structure of a twophase flow of a gasliquid bubble mixture in a vertical ascending flow in a pipe are presented. The mathematical model is based on the use of the twofluid Eulerian approach taking into account the inverse influence of bubbles on averaged characteristics and turbulence of the carrying phase. The turbulent kinetic energy of a liquid is calculated using equations for the transfer of Reynolds stresses. To describe the dynamics of bubble size distribution, the equations of particle number conservation for individual groups of bubbles with different constant diameters for each fraction are used taking into account the processes of breakup and coalescence. The influence of changes in the degree of dispersion of the gas phase, volume flow gas content and the velocity of the dispersed phase on the local structure and surface friction in the twophase flow is numerically investigated. Comparison of simulation results with experimental data has shown that the developed approach allows an adequate description of turbulent gasliquid flows in a wide range of changes in gas content and initial bubble sizes. 
Keywords  multiphase flow, turbulence, Euler method 
UDC  536.423, 532.52 
MSC  76T10, 76F60 
DOI  10.20537/vm180309 
Received  1 July 2018 
Language  Russian 
Citation  Snigerev B.A. Study of the effect of the gas phase on the structure of turbulent flow and friction in the stream of a watergas mixture in a vertical pipe, Vestnik Udmurtskogo Universiteta. Matematika. Mekhanika. Komp'yuternye Nauki, 2018, vol. 28, issue 3, pp. 395406. 
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