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首页> 外文会议>7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.1: Advanced Energy Systems; Advanced Heat Transfer in Engineering Systems; ... >FLOW PATTERN EVOLUTION WITH TIME MIXING OF NON-NEWTIONIAN FLUID IN A STIRRED TANK USING PARTICLE IMAGE VELOCIMETRY
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FLOW PATTERN EVOLUTION WITH TIME MIXING OF NON-NEWTIONIAN FLUID IN A STIRRED TANK USING PARTICLE IMAGE VELOCIMETRY

机译：非牛顿流体在搅拌罐中的混合运动，利用粒子图像测速

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摘要

This paper presents an experimental analysis of the evolution with time of the flow pattern in a stirred tank equipped with a rotor-stator mixer, when mixing a time dependent non-Newtonian fluid. Particle image velocimetry (PIV) is used to determine 2D velocity maps. Polyacrylamide (PAAm) aqueous solution is used as model of time dependent shear thinning fluids. Creep compliance and recovery tests are performed to follow the evolution of the fluid rheology, from a viscoelastic behaviour to a purely viscous one. This indicates mixing has almost completely destroyed the initial network structure of the non-Newtonian fluid. The evolution of the flow pattern with the mixing time is compared with the flow patterns obtained in presence of Newtonian fluids as water and glycerol aqueous solution.
机译：本文介绍了在混合有时间依赖性的非牛顿流体时，在装有转子-定子混合器的搅拌釜中，流动模式随时间变化的实验分析。粒子图像测速（PIV）用于确定2D速度图。聚丙烯酰胺（PAAm）水溶液用作时间依赖性剪切稀化流体的模型。进行蠕变柔顺性和恢复测试，以追踪流体流变学的变化，从粘弹性行为到纯粘性行为。这表明混合几乎完全破坏了非牛顿流体的初始网络结构。将流动模式随混合时间的变化与在牛顿流体（如水和甘油水溶液）存在下获得的流动模式进行比较。

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