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Linear viscoelastic analysis using frequency-domain algorithm on oscillating circular shear flows for bubble suspensions

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/72705

Title: Linear viscoelastic analysis using frequency-domain algorithm on oscillating circular shear flows for bubble suspensions
Authors: Tasaka, Yuji Browse this author →KAKEN DB
Yoshida, Taiki Browse this author
Rapberger, Richard Browse this author
Murai, Yuichi Browse this author →KAKEN DB
Keywords: Rheometry
Ultrasonic velocimetry
Linear viscoelasticity
Bubble suspensions
Issue Date: Mar-2018
Publisher: Springer
Journal Title: Rheologica Acta
Volume: 57
Issue: 3
Start Page: 229
End Page: 240
Publisher DOI: 10.1007/s00397-018-1074-z
Abstract: To achieve a stable evaluation of the linear viscoelasticity of bubble suspensions, which have difficulties for conventional rheometers from spatial distributions of rheological properties with bubble deformations, we proposed a novel rheometry based on spatio-temporal velocity data obtained by ultrasonic velocity profiling (UVP). A frequency-domain algorithm was adopted to overcome a critical influence of measurement noise on the rheological assessment, which is inferred from error propagation characteristics through the equations of motion in discretized form. Applicability and advantage of the present rheometry with the frequency-domain algorithm were verified by two kinds of fluids: high viscous oil as a Newtonian fluid and polyacrylamide aqueous solution as a shear thinning, viscoelastic fluid. The rheometry was finally adopted for bubble suspensions subject to high oscillatory shear, and it could validly extract elasticity-originated momentum transfer as a function of space.
Rights: "The final publication is available at link.springer.com".
Type: article (author version)
URI: http://hdl.handle.net/2115/72705
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田坂 裕司

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