Abstract
The results of numerically modeling two-dimensional two-phase flow of the “gas-solid particles” type in a vertical turbulent jet are presented for three cases of its configuration, namely, descending, ascending, and without account of gravity. Both flow phases are modeled on the basis of the Navier-Stokes equations averaged within the framework of the Reynolds approximation and closed by an extended k-ɛ turbulence model. The averaged two-phase flow parameters (particle and gas velocities, particle concentration, turbulent kinetic energy, and its dissipation) are described using the model of mutually-penetrating continua. The model developed allows for both the direct effect of turbulence on the motion of disperse-phase particles and the inverse effect of the particles on turbulence leading to either an increase or a decrease in the turbulent kinetic energy of the gas. The model takes account for gravity, viscous drag, and the Saffman lift. The system of equations is solved using a difference method. The calculated results are in good agreement with the corresponding experimental data which confirms the effect of solid particles on the mean and turbulent characteristics of gas jets.
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Original Russian Text © A.I. Kartushinskii, E.E. Michaelides, Yu.A. Rudi, S.V. Tisler, I.N. Shcheglov, 2012, published in Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, 2012, Vol. 47, No. 6, pp. 99–108.
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Kartushinskii, A.I., Michaelides, E.E., Rudi, Y.A. et al. Numerical modeling of a two-dimensional vertical turbulent two-phase jet. Fluid Dyn 47, 769–777 (2012). https://doi.org/10.1134/S0015462812060099
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DOI: https://doi.org/10.1134/S0015462812060099