All fiber-optic viscosity, density, and temperature measurements of liquids using a photothermally actuated cantilever

Freytag, Annica I.; MacLean, Amy G.; Abtahi, Mahtab; Barnes, Jack A.; Loock, Hans‐Peter

doi:10.1007/s00340-018-7079-6

Cited by 3 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The position of the inner boundary is chosen to satisfy the helioseimology observation for the shear magnitude within the tachocline (Kosovichev 1996). The turbulent parameters below the convection zone are defined following the results of Freytag & Steffen (1999), also see Paxton et al (2011). We apply an exponential decrease of all turbulent coefficients (except the eddy viscosity and eddy diffusivity) with decrement -100, i.e., they are multiplied by a factor of exp (−100z/R), where z is the distance from the bottom of the convection zone.…”

Section: The Heat Transport and Angular Momentum Balancementioning

confidence: 99%

On the Origin of Solar Torsional Oscillations and Extended Solar Cycle

Пипин

Kosovichev

2019

ApJ

View full text Add to dashboard Cite

We present a nonlinear mean-field model of the solar interior dynamics and dynamo, which reproduces the observed cyclic variations of the global magnetic field of the Sun, as well as the differential rotation and meridional circulation. Using this model, we explain, for the first time, the extended 22-year cycle of the solar torsional oscillations, observed as propagation of zonal variations of the angular velocity from high latitudes to the equator during the time equal to the full dynamo cycle. Our results show that the torsional oscillations result from an overlay of dynamo waves propagating in the bulk of the convection zone. The oscillations are driven by a combinations of magnetic field effects acting on turbulent angular momentum transport the dynamo-induced variations of meridional circulation and the large-scale Lorentz force. They are the primary drivers of the torsional oscillations, and provide necessary conditions for the extended solar-cycle phenomenon.

show abstract

Section: The Heat Transport and Angular Momentum Balancementioning

confidence: 99%

On the Origin of Solar Torsional Oscillations and Extended Solar Cycle

Пипин

Kosovichev

2019

ApJ

View full text Add to dashboard Cite

show abstract

“…In general, dynamic mode cantilevers have received extensive attention in physical and chemical sensing. The fundamental out-of-plane bending is a typical vibrating mode of cantilevers that can be flexibly excited by electrostatic 8 , piezoelectric 9 , 10 , photothermal 11 , and magnetic 12 , 13 forces. Meanwhile, torsional vibration 14 – 16 is used as an alternative for enhancing the sensing behavior of cantilevers.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric-AlN resonators at two-dimensional flexural modes for the density and viscosity decoupled determination of liquids

Huang

Luo

et al. 2022

Microsyst Nanoeng

View full text Add to dashboard Cite

A micromachined resonator immersed in liquid provides valuable resonance parameters for determining the fluidic parameters. However, the liquid operating environment poses a challenge to maintaining a fine sensing performance, particularly through electrical characterization. This paper presents a piezoelectric micromachined cantilever with a stepped shape for liquid monitoring purposes. Multiple modes of the proposed cantilever are available with full electrical characterization for realizing self-actuated and self-sensing capabilities. The focus is on higher flexural resonances, which nonconventionally feature two-dimensional vibration modes. Modal analyses are conducted for the developed cantilever under flexural vibrations at different orders. Modeling explains not only the basic length-dominant mode but also higher modes that simultaneously depend on the length and width of the cantilever. This study determines that the analytical predictions for resonant frequency in liquid media exhibit good agreement with the experimental results. Furthermore, the experiments on cantilever resonators are performed in various test liquids, demonstrating that higher-order flexural modes allow for the decoupled measurements of density and viscosity. The measurement differences achieve 0.39% in density and 3.50% in viscosity, and the frequency instability is below 0.05‰. On the basis of these results, design guidelines for piezoelectric higher-mode resonators are proposed for liquid sensing.

show abstract

The Photonic Guitar Pickup: A High-Sensitivity, High-Bandwidth Fiber Strain Sensor

Barnes

Loock

2019

2019 Conference on Lasers and Electro-Optics Europe &Amp; European Quantum Electronics Conference (CLEO/Europe-EQEC)

View full text Add to dashboard Cite

All fiber-optic viscosity, density, and temperature measurements of liquids using a photothermally actuated cantilever

Cited by 3 publications

References 26 publications

On the Origin of Solar Torsional Oscillations and Extended Solar Cycle

On the Origin of Solar Torsional Oscillations and Extended Solar Cycle

Piezoelectric-AlN resonators at two-dimensional flexural modes for the density and viscosity decoupled determination of liquids

The Photonic Guitar Pickup: A High-Sensitivity, High-Bandwidth Fiber Strain Sensor

Contact Info

Product

Resources

About