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Collision-induced dispersion of agglomerate suspensions in a shear flow

机译:碰撞引起的团聚悬浮液在剪切流中的分散

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摘要

Agglomerates suspended in a polymer fluid have been known to disperse in a flow through two mechanisms-rupture and erosion. Using silica agglomerates, it is shown here that a third mechanism can occur, i.e., detachment of fragments due to agglomerate collision. This mechanism requires a much lower overall stress than erosion (and rupture, which occurs at even larger stresses than erosion). The fragment concentration produced by collision at a given time is proportional to the square of the applied shear rate. (C) 2000 John Wiley & Sons, Inc. [References: 5]
机译:已知悬浮在聚合物流体中的附聚物通过两种机制破裂和侵蚀而分散在流中。使用二氧化硅附聚物,在此显示出第三种机理,即由于附聚物碰撞而导致的碎片的分离。这种机制所需的总应力比腐蚀要低得多(和断裂,在比腐蚀更大的应力下发生断裂)。在给定时间通过碰撞产生的碎片浓度与所施加的剪切速率的平方成比例。 (C)2000 John Wiley&Sons,Inc. [参考:5]

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