Journal
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
Volume 113, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.icheatmasstransfer.2020.104518
Keywords
Taylor-Couette flow; Natural convection; Buoyancy-driven instability; Lagrangian particle tracking; Numerical simulation
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The present paper aims at studying the particle trajectories and sedimentation inside Taylor-Couette buoyancy-driven flows. The dynamical and thermal features of Taylor-Couette-flows inside a three-dimensional differentially heated cavity are investigated for Reynolds numbers Re ranging from 67.3 to 392.7 and Grashof numbers Gr between 764.4 <= Gr <= 3822.1. The results indicate a strong interaction between natural convection and the base Taylor-Couette flow due to rotation for a weak radial temperature gradient. A spectral analysis allows to identify different flow regimes. For discrete particle simulations, the Lagrangian Particle Tracking method is used to follow the particle trajectories inside the Taylor-Couette apparatus. Water droplets are considered as solid spherical particles with different diameters (10 <= D-P <= 35 mu m). The time analysis of suspended and deposited particles along different walls shows that the rotation of the inner-cylinder coupled to the natural convection influences significantly the time and location of the particle deposition.
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