Simulation of bed load transport in turbulent open channel flow
Simulation of bed load transport in turbulent open channel flow
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湍流明渠流中床荷输送的模拟
DOI：
10.1002/pamm.201210241
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
J. Fröhlich
中科院分区：
文献类型：
--
作者：
B. Vowinckel;J. Fröhlich
本文报道了载颗粒明渠流动的直接数值模拟，以研究分散相和连续相之间的相互作用。分散相用浸入边界法表示。粒子-粒子碰撞由物理驱动的碰撞模型来解释。考虑了剪应力低于动员阈值和剪应力高于动员阈值两种情况。不同的密度比导致不同类型的流场修正，形成密度特定的颗粒图案。光粒子不会达到静息状态，而是沿跨向均匀分布。重粒子倾向于形成非活性粒子的流状簇。（©2012 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim）
The paper reports on direct numerical simulations of a particle‐laden open channel flow carried out to investigate the interaction between the dispersed and the continuous phase. The dispersed phase is represented by an immersed boundary method. The particle‐particle collisions are accounted for by a physically motivated collision model. Two cases, one with shear stress below the threshold of mobilization and the other with shear stress above the threshold are considered. The different density ratios lead to different types of modification of the flow field by the formation of density‐specific patterns of the particles. Light particles do not attain resting states but saltate evenly distributed in span‐wise direction. Heavy particles tend to form stream‐wise clusters of inactive particles. (© 2012 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)