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从力学的角度出发,在由两个同心圆筒形成的旋转剪切流场中,分析油水乳化液中分散相液滴的受力及形变,推导出分散相液滴受力与液滴形变的相互关系。提出了剪切流场中液滴形变的三维力学模型,初步建立了拉伸率、收缩系数和剪切应力之间的关系。结果表明,如果测得液滴破裂的临界拉伸率,就很容易求得液滴破裂的临界剪切应力,从而可以应用分散相液滴的拉伸率或收缩系数来分析剪切对油水分离特性的影响。
From the point of view of mechanics, the force and deformation of dispersed droplets in oil-water emulsion were analyzed in the rotating shear flow field formed by two concentric cylinders, and the force and drop deformation of dispersed droplets Interrelationship. The three-dimensional mechanical model of droplet deformation in shear flow field is proposed, and the relationship between the elongation rate, shrinkage coefficient and shear stress is preliminarily established. The results show that if the critical drop rate of droplet breakage is measured, the critical shear stress of droplet breakage can be easily obtained, so that the shear rate and shrinkage coefficient of droplet dispersion can be used to analyze the effect of shear on oil-water separation Effect of characteristics.