Simulation of the hydrodynamic drag force on aggregates
Simulation of the hydrodynamic drag force on aggregates
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DOI：
10.1163/1568552053166674
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发表时间：
2005
影响因子：
5.2
通讯作者：
K. Iimura;K. Higashitani
中科院分区：
文献类型：
--
作者：
K. Iimura;K. Higashitani
翻译后摘要-一个模拟模型来预测流动中的大聚集体的动态行为的开发，其中暴露于流的有效颗粒表面进行了评估，并考虑到由于相邻颗粒的流体速度的降低。应用该模型预测了规则形状聚集体在静止流体中沉降的动态形状因子，并将模拟结果与文献报道的实验结果进行了比较。结果表明，该模型能定量地模拟作用在骨料上的水动力拖曳力。这表明所提出的模拟模型适用于预测流动中大团聚体的复杂行为，如它们的变形和破碎。
Abstract —A simulation model to predict the dynamic behavior of large aggregates in flows was developed, in which the effective particle surface exposed to the flow was evaluated and the reduction of fluid velocity due to neighboring particles was taken into account. Thismodel was applied to predict the dynamic shape factors of regular shaped aggregates settling in a quiescent fluid and the simulated results were compared with the experiments reported elsewhere. It is found that the hydrodynamic drag force exerted on aggregates is simulated quantitatively by the present model. This indicates that the proposed simulation model is applicable to predict the complicated behavior of large aggregates in flows, such as their deformation and breakup.