Dynamic viscoelasticity measurement under alternative torque using electromagnetically spinning method with quadruple electromagnets

In this study, we developed a novel type of rheological measurement system. Here, a spherical probe is driven to rotate periodically by applying torques using quadruple electromagnets in a noncontact manner. Moreover, this system is an enhancement of our electromagnetically spinning (EMS) viscometer...

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Bibliographic Details
Published inReview of scientific instruments Vol. 88; no. 7; p. 075101
Main Authors Matsuura, Yusuke, Hirano, Taichi, Sakai, Keiji
Format Journal Article
LanguageEnglish
Published United States 01.07.2017
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Summary:In this study, we developed a novel type of rheological measurement system. Here, a spherical probe is driven to rotate periodically by applying torques using quadruple electromagnets in a noncontact manner. Moreover, this system is an enhancement of our electromagnetically spinning (EMS) viscometer, which is widely used for measuring rheological flow curves in various industrial fields. The quadruple EMS method provides the frequency spectrum of viscoelasticity, in addition to shear viscosity, in a steady flow by switching the operation modes of the driving torque. We show the results obtained for Newtonian fluids and viscoelastic materials and demonstrate the validity of the system.
ISSN:1089-7623
DOI:10.1063/1.4991821