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Article Dans Une Revue International Journal of Multiphase Flow Année : 2017

Four-way coupled Eulerian–Lagrangian Direct Numerical Simulations in a vertical laminar channel flow

Résumé

Direct Numerical Simulations of a laminar two-phase flow into a vertical channel are investigated. An Eulerian-Lagrangian approach allows tracking each bubble position with a four-way coupling strategy, i.e. taking into account bubble-fluid and bubble-bubble interactions. The flow configuration has been chosen to highlight the buoyancy effects due to significant values of void fraction (high numbers of bubbles); hence the bubbles collisions and wall effects are the critical parameters to ensure the dispersion of the bubble plume. The DNS approach is self-consistent and does not rely on closure relations or empirical correlations for describing the collective bubble dynamics. It is found that the DNS predicts well the behavior of the bubble plume and its back effect on the liquid phase when compared with a mixture model and experimental data. The elastic nature of collisions, the sensitivity of the mean and RMS values of velocities and void fraction to the mesh quality are explored.
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Dates et versions

hal-02545878 , version 1 (28-04-2020)

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Jonathan Schillings, Olivier Léon Doche, Mauricio Tano Retamales, Frédéric Bauer, Jonathan Deseure, et al.. Four-way coupled Eulerian–Lagrangian Direct Numerical Simulations in a vertical laminar channel flow. International Journal of Multiphase Flow, 2017, 89, pp.92-107. ⟨10.1016/j.ijmultiphaseflow.2016.10.006⟩. ⟨hal-02545878⟩
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