Next Article in Journal
Monitoring of Pre-Load on Rock Bolt Using Piezoceramic-Transducer Enabled Time Reversal Method
Previous Article in Journal
Power Allocation Scheme for Non-Orthogonal Multiple Access in Underwater Acoustic Communications
Open AccessArticle

Determination of Fluid Density and Viscosity by Analyzing Flexural Wave Propagations on the Vibrating Micro-Cantilever

by Deokman Kim 1,†, Seongkyeol Hong 2,†, Jaesung Jang 2,* and Junhong Park 1,*
1
Department of Mechanical Engineering, Hanyang University, Seoul 04763, Korea
2
Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
*
Authors to whom correspondence should be addressed.
These two authors contributed equally to this work.
Sensors 2017, 17(11), 2466; https://doi.org/10.3390/s17112466
Received: 19 September 2017 / Revised: 16 October 2017 / Accepted: 24 October 2017 / Published: 27 October 2017
(This article belongs to the Section Physical Sensors)
The determination of fluid density and viscosity using most cantilever-based sensors is based on changes in resonant frequency and peak width. Here, we present a wave propagation analysis using piezoelectrically excited micro-cantilevers under distributed fluid loading. The standing wave shapes of microscale-thickness cantilevers partially immersed in liquids (water, 25% glycerol, and acetone), and nanoscale-thickness microfabricated cantilevers fully immersed in gases (air at three different pressures, carbon dioxide, and nitrogen) were investigated to identify the effects of fluid-structure interactions to thus determine the fluid properties. This measurement method was validated by comparing with the known fluid properties, which agreed well with the measurements. The relative differences for the liquids were less than 4.8% for the densities and 3.1% for the viscosities, and those for the gases were less than 6.7% for the densities and 7.3% for the viscosities, showing better agreements in liquids than in gases. View Full-Text
Keywords: density; viscosity; wave propagation analysis; cantilever sensor; fluid-structure interaction density; viscosity; wave propagation analysis; cantilever sensor; fluid-structure interaction
Show Figures

Figure 1

MDPI and ACS Style

Kim, D.; Hong, S.; Jang, J.; Park, J. Determination of Fluid Density and Viscosity by Analyzing Flexural Wave Propagations on the Vibrating Micro-Cantilever. Sensors 2017, 17, 2466.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop