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CFD study of the mixing of pseudoplastic fluids with yield stress in a two-staged stirred tank

机译:双分阶段搅拌罐中屈服应力混合伪塑性液混合的CFD研究

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The 3D flow field generated by two-stage impellers in the agitation of xanthan gum, a pseudoplastic fluid with yield stress, was simulated using the commerical CFD package. The effect of impeller speed and impeller spacing on power number, cavern size and viscosity distribution was investigated in this work. The results showed that the power number was slightly influenced by impeller spacing. Higher impeller speed and larger impeller spacing contributed to creation of a bigger cavern. The range of high viscosity zone between the impellers increased with an increase in impeller spacing. Impeller speed and impeller spacing could be used as important parameters to improve the mixing performance of multi-stage impellers in the mixing of pseudoplastic fluids with yield stress.
机译:使用商业CFD封装模拟由两阶段叶轮在黄原牙龈搅拌中产生的三瓣叶片,屈服应力的假塑性流体。在这项工作中研究了叶轮速度和叶轮间距对功率数,洞穴尺寸和粘度分布的影响。结果表明,功率数字受到叶轮间距的略微影响。更高的叶轮速度和较大的叶轮间距导致更大的洞穴的创造。叶轮之间的高粘度区的范围随着叶轮间距的增加而增加。叶轮速度和叶轮间距可用作提高多级叶轮在具有屈服应力的假塑性流体混合中的混合性能的重要参数。

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