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Liquid–solid two-phase jet in a turbulent crossflow: Experiments and simulations
Chemical Engineering Research and Design ( IF 3.350 ) Pub Date : 2020-01-11 , DOI: 10.1016/j.cherd.2020.01.004
C. Octau, T. Dbouk, M. Watremez, D. Meresse, M. Lippert, J. Schiffler, L. Keirsbulck, L. Dubar

Compared to single-liquid and liquid–liquid jets in crossflow (JICF), liquid–solid two-phase JICF is rarely studied. An experimental setup has been developed to investigate a vertical jet of liquid–solid mixture in water turbulent crossflow at Re2.2·104 over 4 s period. Rigid micro particles were injected vertically in a horizontal pure-water turbulent flow. The jet trajectory, penetration and the particles concentration were recorded via a high resolution camera with particles tracking technique. Three-dimensional CFD simulations have been conducted using two different Eulerian models: two-Fluid model in commercial code, and a new mixture model solver developed in opensource to predict the hydrodynamics, jet trajectory and particles transport. A modified-kε model (for particle induced turbulence, and turbulent dispersion), and a modified-buoyant-kε model have been employed in the commercial and open-source codes, respectively. At t2.5 s near the jet's entry (x/h>0.2,y/h<0.15), both models predicted local ϕ values similar to the experiments. While at t=2.5 s, only the mixture model predicted the jet's bend with ϕ0 in the zone (x/h>0.2,y/h<0.15) as in the experiment. The mixture model constitutes a good compromise for conducting global predictions of suspension JICFs at a computational cost that is reduced by a factor of the order of O(10).

更新日期:2020-01-11

 

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