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Liquid-solid two-phase jet in a turbulent crossflow: Experiments and simulations
Chemical Engineering Research & Design ( IF 3.073 ) 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 Re≈2.2·104 over 4 seconds 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-k−ɛ model (for particle induced turbulence, and turbulent dispersion), and a modified-buoyant-k−ɛ model have been employed in the commercial and open-source codes, respectively. At t≤2.5s 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=2.5s, only the mixture model predicted the jet's bend with ϕ≈0 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:2020-01-13

 

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