Modeling and simulation of the influences of particle-particle interactions on dense solid–liquid suspensions in stirred vessels
Modeling and simulation of the influences of particle-particle interactions on dense solid–liquid suspensions in stirred vessels
复制标题
颗粒-颗粒相互作用对搅拌容器中致密固液悬浮液影响的建模和模拟
DOI：
10.1016/j.ces.2017.11.017
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发表时间：
2018-02
影响因子：
4.7
通讯作者：
Zheng-Hong Luo
中科院分区：
文献类型：
--
作者：
Le Xie;Zheng-Hong Luo
固-液悬浮液在工业生产过程中经常遇到。固液悬浮的动力学行为取决于液体-颗粒和颗粒-颗粒之间的相互作用。在这项工作中，欧拉-欧拉模型被用来描述悬浮动力学和颗粒之间的相互作用在固液混合容器中的作用进行了研究。基于改进的颗粒流动力学理论，考虑了粗颗粒的碰撞和摩擦，计算了颗粒的压力和粘度。预测了固相含率和速度，并与半经验模型进行了比较。几个关键的模型参数的影响进行了研究。计算流体动力学模拟与实验数据的比较表明，令人满意的协议，这验证了多流体模型的鲁棒性。该模型被应用于研究颗粒尺寸和固体含量的影响，以探索颗粒间相互作用的重要性。模拟结果表明，颗粒间的相互作用可以影响悬浮特性的情况下，大粒径和高固体含量。
Solid–liquid suspensions are commonly encountered in industrial production processes. The dynamics of the solid–liquid suspension behaviors depends on both liquid–particle and particle–particle interactions. In this work, an Eulerian–Eulerian model is used to characterize the suspension dynamics and the role of particle–particle interactions in solid-liquid mixing vessels is studied. The collision and friction of coarse particles are considered by calculating solid pressure and viscosity based on a modified kinetic theory of granular flow (KTGF). The solid phase holdup and the velocity are predicted and compared with semi-empirical models. Effects of several key model parameters are investigated as well. The comparison between computational fluid dynamics simulations and experimental data shows a satisfactory agreement, which validates the robustness of the multi-fluid model. The proposed model is then applied to study the influences of particle size and solid loading for exploring the importance of particle–particle interactions. The obtained simulation results show that particle–particle interactions can influence suspension characteristics in the case of large particle size and high solid loading.
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影响因子：
2.5
作者：
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通讯作者：
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影响因子：
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