Ultrasound image velocimetry for rheological measurements
Ultrasound image velocimetry for rheological measurements
复制标题
用于流变测量的超声图像测速
DOI：
10.1088/0957-0233/27/9/094008
复制
发表时间：
2016
影响因子：
2.4
通讯作者：
C. Poelma
中科院分区：
文献类型：
--
作者：
A. Gurung;J. Haverkort;S. Drost;B. Norder;J. Westerweel;C. Poelma
超声图像测速技术（UIV）允许对各种流量进行非侵入式测量，而无需光学透明度。在这项研究中，我们使用UIV测量局部速度场的模型钻井液，表现出屈服应力流动行为。采用径向速度分布确定屈服应力和Herschel-Bulkley模型流动指数n和稠度指数k。使用常规离线Couette流变测定法获得参考数据。比较表明，两种方法之间的合理协议。模型参数的差异可归因于方法之间的固有差异，所使用的三参数模型无法捕捉到这些差异。总体而言，通过整体流场测量技术（如UIV），我们能够量化模型钻井液的复杂流变性。这些初步结果表明，UIV可用作复杂不透明流动流变学原位实时测量的非侵入性诊断。
Ultrasound image velocimetry (UIV) allows for the non-intrusive measurement of a wide range of flows without the need for optical transparency. In this study, we used UIV to measure the local velocity field of a model drilling fluid that exhibits yield stress flow behavior. The radial velocity profile was used to determine the yield stress and the Herschel–Bulkley model flow index n and the consistency index k. Reference data were obtained using the conventional offline Couette rheometry. A comparison showed reasonable agreement between the two methods. The discrepancy in model parameters could be attributed to inherent differences between the methods, which cannot be captured by the three-parameter model used. Overall, with a whole flow field measurement technique such as UIV, we were able to quantify the complex rheology of a model drilling fluid. These preliminary results show that UIV can be used as a non-intrusive diagnostic for in situ, real-time measurement of complex opaque flow rheology.