Abstract：
:This will be a discussion of the non-invasive determination of the viscosity of a non-Newtonian fluid in laminar pipe flow over the range of shear rates present in the pipe. The procedure used requires knowledge of the flow profile in and the pressure drop along a long straight run of pipe. The profile is determined by using a pulsed ultrasonic Doppler velocimeter. This approach is ideal for making non-invasive, real-time measurements for monitoring and control. Rheograms of a shear thinning gel will be presented. The operating parameters and limitations of the Doppler-based instrument will be discussed. The most significant limitation is velocity gradient broadening of the Doppler spectra near the walls of the pipe. This limitation can be significant for strongly shear thinning fluids (depending also on the ratio of beam to pipe diameter and the transducer's insertion angle).
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Pfund DM,Greenwood MS,Bamberger JA,Pappas RAdoi
10.1016/j.ultras.2006.05.027subject
Has Abstractpub_date
2006-12-22 00:00:00pages
e477-82eissn
0041-624Xissn
1874-9968pii
S0041-624X(06)00058-8journal_volume
44 Suppl 1pub_type
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