Flow Prediction of Complex Fluids in a Circular Pipe by Utilizing a Velocity-Profiling-Assisted Rheometer
Flow Prediction of Complex Fluids in a Circular Pipe by Utilizing a Velocity-Profiling-Assisted Rheometer
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利用速度分布辅助流变仪预测圆形管道中复杂流体的流量
DOI：
10.1021/acs.iecr.2c03022
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Murai Yuichi
中科院分区：
文献类型：
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作者：
Ohie Kohei;Yoshida Taiki;Tasaka Yuji;Murai Yuichi
使用速度分布辅助流变仪对圆形管道中的复杂流体进行流动预测。作为应用实例，评估了羧甲基纤维素和聚丙烯酰胺水溶液以及米粥的剪切速率依赖性应力和粘度。羧甲基纤维素是众所周知的食品和化妆品增稠剂；后两个示例代表了超出标准扭矩型流变仪应用范围的复杂流体，因为 PAM 解决方案会导致剪切局部化问题，并且粥包含 O(1 mm) 尺寸的分散体。获得的剪切速率范围为O(10–1–101s–1)的流动曲线用于预测稳定压力梯度下管道内的层流，这是工业上适用的目标。预测的速度剖面与中试管道中测量的实验结果非常吻合，所有测试流体的流量最大相对误差均小于 10%。这表明，将流变评估应用于流动预测对于标准流变仪无法应用的复杂流体具有很高的工业实用性。
Flow prediction of complex fluids in a circular pipe was conducted using a velocity-profiling-assisted rheometer. As application examples, shear-rate-dependent stress and viscosity of carboxymethyl cellulose and polyacrylamide aqueous solutions and rice porridge were evaluated. Carboxymethyl cellulose is a well-known thickener for foods and cosmetics; the latter two examples represent complex fluids that are outside the scope of application of a standard torque-type rheometer because the PAM solution causes shear-localization problems and the porridge includesO(1 mm) size dispersions. The obtained flow curve in shear rate range ofO(10–1–101s–1) was used to predict laminar flow in a pipe under a steady pressure gradient, which is an industrially applicable target. The predicted velocity profiles were in good agreement with experimental results measured in a pilot pipeline, where the maximum relative error of flow rate was less than 10% for all test fluids. This suggests that the application of the rheological evaluation to flow prediction has high industrial practicality to complex fluids which are out of application of the standard rheometer.