Sensing of fluid viscoelasticity from piezoelectric actuation of cantilever flexural vibration

Title
Sensing of fluid viscoelasticity from piezoelectric actuation of cantilever flexural vibration
Authors
박준홍
Keywords
VISCOSITY; LIQUID
Issue Date
2015-03
Publisher
AMER INST PHYSICS
Citation
REVIEW OF SCIENTIFIC INSTRUMENTS, v. 86, NO 1, Page. 1-6
Abstract
An experimental method is proposed to measure the rheological properties of fluids. The effects of fluids on the vibration actuated by piezoelectric patches were analyzed and used in measuring viscoelastic properties. Fluid-structure interactions induced changes in the beam vibration properties and frequency-dependent variations of the complex wavenumber of the beam structure were used in monitoring these changes. To account for the effects of fluid-structure interaction, fluids were modelled as a simple viscoelastic support at one end of the beam. The measured properties were the fluid's dynamic shear modulus and loss tangent. Using the proposed method, the rheological properties of various non-Newtonian fluids were measured. The frequency range for which reliable viscoelasticity results could be obtained was 10-400 Hz. Viscosity standard fluids were tested to verify the accuracy of the proposed method, and the results agreed well with the manufacturer's reported values. The simple proposed laboratory setup for measurements was flexible so that the frequency ranges of data acquisition were adjustable by changing the beam's mechanical properties. (C) 2015 AIP Publishing LLC.
URI
http://scitation.aip.org/content/aip/journal/rsi/86/1/10.1063/1.4905331http://hdl.handle.net/20.500.11754/23364
ISSN
0034-6748; 1089-7623
DOI
http://dx.doi.org/10.1063/1.4905331
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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