Modelling of high viscosity oil drop breakage process in intermittent turbulence
Modelling of high viscosity oil drop breakage process in intermittent turbulence
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DOI：
10.1016/j.ces.2005.10.048
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发表时间：
2006-05
影响因子：
4.7
通讯作者：
W. Podgórska
中科院分区：
文献类型：
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作者：
W. Podgórska
应用湍流细尺度结构的多重分形模型描述了不混溶液体粘性液滴在充分发展的湍流中的破碎。这里考虑的是其直径福尔斯落在湍流惯性子范围内的液滴群。粒子数平衡方程用于预测液滴粒径分布。计算进行了二进制和多重破损。几个女儿分布函数的应用和它们的应用结果与实验数据进行了比较。在直径为0.15m、装有Rushton型搅拌器和四块挡板的平底搅拌槽中进行了液滴破碎的实验研究。将粘度为10、100、500和1000mPas的硅油分散在水性连续相中。使用高分辨率数码相机进行测量。实验结果和数值模拟表明，在多重破裂的初始阶段之后，强非对称型的二元破裂占主导地位。
A multifractal model of the fine-scale structure of turbulence is applied to describe breakage of viscous drops of immiscible liquid immersed in a fully developed turbulent flow. A population of drops whose diameter falls within the inertial subrange of turbulence is considered here. The population balance equation is used to predict the drop size distributions. Calculations are performed for binary and multiple breakage. Several daughter distribution functions are applied and the results of their application are compared with experimental data. Experimental investigations of drop breakup were carried out in a flat bottom stirred tank having the diameter of T=0.15m and equipped with Rushton type agitator and four baffles. Silicone oils with viscosity of 10, 100, 500 and 1000mPas were dispersed in the aqueous continuous phase. Measurements were performed using high resolution digital camera. Experimental results as well as numerical simulations show that after the initial period of multiple breakage, the strongly asymmetric type of binary breakage dominates.