Collision efficiency of equal spherical particles in a shear flow. The influence of London-van der Waals forces
Collision efficiency of equal spherical particles in a shear flow. The influence of London-van der Waals forces
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剪切流中等球形颗粒的碰撞效率。
DOI：
10.1039/tf9706601381
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发表时间：
1970
影响因子：
--
通讯作者：
L. M. Hocking
中科院分区：
文献类型：
--
作者：
A. Curtis;L. M. Hocking
本文介绍了一种研究London-Van der Waals力对正动力学絮凝影响的理论和实验方法。理论处理评估了这些力对层流剪切流中两个球形颗粒相互作用的影响，从而给出了碰撞效率(稳定性比)的值。报道了单分散聚苯乙烯微珠在层流剪切流中絮凝的实验测量结果，验证了该理论。利用本文所述的理论方法，可以由正动力学絮凝的测量结果计算出聚苯乙烯在水相悬浮液中的London-Hamaker常数，所得结果与用其他方法得到的值符合得很好。该方法还提供了一种测量这些力的“特征波长”的方法。
A theoretical and experimental approach to the investigation of the influence of London-Van der Waals forces on orthokinetic flocculation is described. The theoretical treatment evaluates the effect of these forces on the interaction of two spherical particles in a laminar shear flow, to give a value of the collision efficiency (stability ratio). The experimental measurements on the flocculation of monodisperse polystyrene beads in a laminar shear flow reported provide a test of the theory. By making use of the theoretical approach described in this paper the London-Hamaker constant for polystyrene in aqueous suspension can be calculated from measurements of orthokinetic flocculation : the values obtained are in good agreement with those derived by other methods. The method additionally provides a means of measuring the “characteristic wavelength” of these forces.