open access

https://hdl.handle.net/2115/86276

Nonintrusive In-Line Rheometry Using Ultrasonic Velocity Profiling

英語

2021-08-04

American Chemical Society

Industrial & engineering chemistry research

60(30)

11535-11543

We present a new approach to realize nonintrusive in-line rheometry without measuring the pressure difference along the pipe, which is required in conventional methods that insert pressure probes in the pipe. The rheometry utilizes unsteadiness of target pipe flows reflected by spatiotemporal velocity information. The quasi-instantaneous rheological properties were estimated by inverse analysis of the equation of motion, which governs unsteady one-directional pipe flows, in the frequency domain. To evaluate applicability of the present in-line rheometry as "viscometry", a numerical experiment was performed using solution of pulsatile pipe flows with different viscosities and frequencies. The limitations of the viscosity measurement range considering the thickness of the viscous layer formed on the pipe wall are discussed. We demonstrated the utility of our method on a laboratory pipe loop facility with viscous silicone oil as the test fluid. Finally, we quantified the time variation of the viscosity due to transient temperature variation of the fluid.

学術雑誌論文

Accepted Manuscript

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Industrial & Engineering Chemistry Research, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/articlesonrequest/AOR-TQT75B89QHAMEYSMTNDS.

0888-5885