Application of in-line ultrasound Doppler-based UVP-PD rheometry method to concentrated model and industrial suspensions
Application of in-line ultrasound Doppler-based UVP-PD rheometry method to concentrated model and industrial suspensions
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DOI：
10.1016/j.flowmeasinst.2007.11.002
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发表时间：
2008-06-01
影响因子：
2.2
通讯作者：
Stading, Mats
中科院分区：
文献类型：
--
作者：
Wiklund, Johan;Stading, Mats
基于在线超声多普勒的UVP-PD流变学方法被评价为对复杂模型和工业悬浮液的非侵入性、实时的流变学表征。该方法是基于超声速度分布(UVP)和压降(PD)测量相结合的。实验是在压力驱动的恒定剪切流动中进行的，在不同的体积流量下，设计了一个模拟工业条件的流动回路。结果表明，可以实时、在线地监测瞬时速度分布和流变学特性。与迄今文献中报道的相比，报道的模型和行业暂停的范围要广泛得多。所研究的悬浮液在颗粒大小、分布、形状和悬浮特性上都不同。对于小于同心圆柱体中剪切间隙的颗粒，使用常规流变仪在线和离线测量的剪切粘度之间的一致性很好。UVP-PD方法适用于常规离线流变仪因剪切间隙大小限制而失效的悬浮液。UVP-PD方法是一种有价值的过程监测工具，因为可以实时、在线地监测加工过程中流变学的快速变化。(C)2007爱思唯尔有限公司。保留所有权利。
The in-line ultrasound Doppler-based UVP-PD rheometry method was evaluated for non-invasive, real-time theological characterization of complex model- and industrial suspensions. The method is based on the combination of ultrasound velocity profile (UVP) and pressure drop (PD) measurements. Experiments were carried out in pressure driven, steady shear flow at different volumetric flow rates in a flow loop, designed to mimic industrial conditions. Results showed that instantaneous velocity profiles and theological properties could be monitored in real-time, in-line. A much wider range of model and industrial suspensions was covered compared to what has so far been reported in literature. Investigated suspensions differed in particle sizes, distributions, shapes and suspension characteristics. The agreement was good between shear viscosities measured in-line and off-line using conventional rheometers for particles smaller than the shear gap in the concentric cylinders. The UVP-PD method is applicable to suspensions for which conventional, off-line rheometers fail due to shear gap size restrictions. The UVP-PD method can be a valuable tool for process monitoring since rapid changes in theology during processing can be monitored in real-time, in-line. (c) 2007 Elsevier Ltd. All rights reserved.