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首页> 外文OA文献 >On the effect of dispersed phase viscosity and mean residence time on the Droplet Size Distribution for High-shear Mixers.
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On the effect of dispersed phase viscosity and mean residence time on the Droplet Size Distribution for High-shear Mixers.

机译：分散相粘度和平均停留时间对高剪切混合器液滴尺寸分布的影响。

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摘要

Properties of emulsified product such as stability, rheology and interfacial area dependent on their micro-structure, specially their mean droplet size and droplet size distribution. Mechanistic models in literature focus on predicting the maximum droplet diameter or Sauter mean diameter but not in their size distribution. The effect of viscosity (9.58-295 mPa s), mean residence time and stirring speed (50-150 s􀀀1) have been investigated using an in-line laboratory scale rotor-stator and dilute (negligible coalescence) coarse emulsions with seven Silicon Oils of different viscosity.Low viscous oils produced monomodal distributions whereas the ones for intermediate and high viscous oils were bimodal. The mode or modes of the distributions were used for the modelling of the large and small daughter droplet sizes. The droplet size modelling had a mean absolute error (MAE) of 8%. To model the distributions by volume two Generalized Gamma functions were used and fitted using the least absolute error. The distributions were reasonably well-described while predicting the Sauter mean diameter of both mono and bimodal distributions with a MAE of 13:8%.
机译：乳化产品的性质，如稳定性，流变学和界面面积，取决于其微观结构，尤其是其平均液滴尺寸和液滴尺寸分布。文献中的机械模型集中于预测最大液滴直径或Sauter平均直径，而不是其大小分布。粘度（9.58-295 mPa s），平均停留时间和搅拌速度（50-150 s＆＃x100000; 1）的影响已使用在线实验室规模的转子-定子和稀（可忽略的聚结）粗乳液与七种粘度不同的硅油。低粘度油呈单峰分布，而中高粘度油呈双峰分布。分布的一个或多个模式用于大小子液滴大小的建模。液滴尺寸模型的平均绝对误差（MAE）为8％。为了对体积分布进行建模，使用了两个广义伽玛函数，并使用了最小绝对误差进行拟合。在预测单峰分布和双峰分布的Sauter平均直径的同时，MAE为13：8％时，可以合理地描述分布。

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