Abstract 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 ≤ Dp ≤ 35 μm). 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.

中文翻译：

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Taylor-Couette 装置中浮力驱动的不稳定性和颗粒沉积

摘要 本文旨在研究Taylor-Couette 浮力驱动流内部的粒子轨迹和沉降。针对雷诺数 Re 范围从 67.3 到 392.7 和 Grashof 数 Gr 介于 764.4 ≤ Gr ≤ 3822.1 之间，研究了三维差热腔内泰勒-库埃特流的动力学和热特征。结果表明，由于弱径向温度梯度的旋转，自然对流和基础 Taylor-Couette 流之间存在强相互作用。光谱分析允许识别不同的流态。对于离散粒子模拟，拉格朗日粒子跟踪方法用于跟踪 Taylor-Couette 装置内的粒子轨迹。水滴被认为是具有不同直径（10 ≤ Dp ≤ 35 μm）的固体球形颗粒。