Publicou 12 edições por ano
ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684
Indexed in
A COMBINED FULLY LAGRANGIAN APPROACH TO MESH-FREE MODELLING OF TRANSIENT TWO-PHASE FLOWS
RESUMO
A new approach to numerical simulation of two-phase, two-dimensional flows (sprays or two-phase jets), based on a combination of the full Lagrangian method for the dispersed phase and the mesh-free vortex blob method for the carrier phase, is suggested. The problem of calculation of all parameters in both phases (including particle concentration) is reduced to the solution of a high-order system of ordinary differential equations, describing transient processes in both carrier and dispersed phases. This allows one to study in detail local zones of particle accumulation in complex transient flows, including those with multiple intersections of particle trajectories and the formation of "folds" in the concentration field of the dispersed phase. The new approach is applied to modelling of the time evolution of a two-phase Lamb vortex and the development of an impulse two-phase jet. These examples involve the formation of local zones of particle accumulation and regions of multiple intersections of particle trajectories. The correct simulation of these flow features is expected to involve serious difficulties when the conventional Eulerian/Lagrangian methods, described in the literature, are used.
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Rybdylova O., Osiptsov A.N., Sazhin S.S., Begg S., Heikal M., A combined viscous-vortex, thermal-blob and Lagrangian method for non-isothermal, two-phase flow modelling, International Journal of Heat and Fluid Flow, 58, 2016. Crossref
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Lebedeva N. A., Osiptsov A. N., A combined Lagrangian method for simulation of axisymmetric gas-particle vortex flows, Fluid Dynamics, 51, 5, 2016. Crossref
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Rybdylova Oyuna, Sazhin Sergei S, Meshless methods for ‘gas – evaporating droplet’ flow modelling, Journal of Physics: Conference Series, 811, 2017. Crossref
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Lebedeva N A, Osiptsov A N, Modeling of inertial-admixture accumulation zones in vortex ring-like flows by fully Lagrangian method, Journal of Physics: Conference Series, 891, 2017. Crossref
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Sazhin S S, Shchepakina E, Sobolev V, Modelling of sprays: recent results and future challenges, Journal of Physics: Conference Series, 1096, 2018. Crossref
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Rybdylova Oyuna, Sazhin Sergei S., Meshless Methods for ‘Gas - Evaporating Droplet’ Flow Modelling, in Extended Abstracts Summer 2016, 10, 2018. Crossref
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Rybdylova O., Sazhin S.S., Osiptsov A.N., Kaplanski F.B., Begg S., Heikal M., Modelling of a two-phase vortex-ring flow using an analytical solution for the carrier phase, Applied Mathematics and Computation, 326, 2018. Crossref
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Papoutsakis Andreas, Rybdylova Oyuna D., Zaripov Timur S., Danaila Luminita, Osiptsov Alexander N., Sazhin Sergei S., Modelling of the evolution of a droplet cloud in a turbulent flow, International Journal of Multiphase Flow, 104, 2018. Crossref
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Agataeva A Zh, Shchepakina E A, Analysis of the threshold phenomena in a dynamic model of a fuel spray ignition, Journal of Physics: Conference Series, 1096, 2018. Crossref
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Rybdylova Oyuna, Osiptsov Alexander N., Sazhin Sergei S., Begg Steven, Heikal Morgan, A fully meshless method for ‘gas - evaporating droplet’ flow modelling, PAMM, 15, 1, 2015. Crossref
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Sazhin Sergei, Spray Formation and Penetration, in Droplets and Sprays, 2014. Crossref
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Danaila Ionut, Kaplanski Felix, Sazhin Sergei S., Applications of the Models, in Vortex Ring Models, 2021. Crossref
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Sazhin Sergei S., Spray Formation and Penetration, in Droplets and Sprays: Simple Models of Complex Processes, 2022. Crossref