Vertical sorting process under oscillatory sheet flow condition by resolved discrete particle model
Vertical sorting process under oscillatory sheet flow condition by resolved discrete particle model
复制标题
通过离散粒子模型解析振荡片流条件下的垂直分选过程
DOI：
10.1080/00221686.2014.994139
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发表时间：
2015
影响因子：
2.3
通讯作者：
N.
中科院分区：
文献类型：
--
作者：
Harada;E.;Gotoh;H. and Tsuruta;N.
为了计算调查的垂直分选机制下的振荡片流条件下的梯度颗粒，一个解决离散颗粒模型结合大涡模拟（LES）的固液两相流。在所提出的方法中，在欧拉流场的可分辨尺度小于颗粒的直径和拉格朗日运动的每个颗粒使用离散元方法进行模拟。使用先前获得的实验数据的数值模型进行了验证。模拟结果表明，最活跃的垂直分选发生在加速阶段，与粒子间的力作用于每个粒子是占主导地位的水动力。关于片流层中的颗粒间力，颗粒“温度”的轮廓支持碰撞力主导接触力的建议。
To computationally investigate the vertical sorting mechanism under an oscillatory sheet flow condition with graded particles, a resolved discrete particle model is employed in conjunction with a large eddy simulation (LES) of a solid–liquid two-phase flow. In the proposed approach, the resolvable scale in the Eulerian flow field is smaller than the diameter of the particle and the Lagrangian motion of each particle is simulated using the discrete element method. The numerical model is verified using previously obtained experimental data. The simulations reveal that most active vertical sorting occurs in the acceleration phase, with interparticle forces acting on each particle being dominant over the hydrodynamic forces. Regarding interparticle forces in the sheet flow layer, the profile of the particle ‘temperature’ supports the suggestion that the collision force dominates over the contact force.