Modeling of the fluid-structure interaction in a fluidic sensor cell

Reichel, Erwin K.; Riesch, Christian; Keplinger, Franz; Jakoby, Bernhard

doi:10.1016/j.sna.2009.03.002

Cited by 21 publications

(8 citation statements)

References 17 publications

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“…9b shows a MEMS metallic suspended plate resonator for viscosity sensing of complex low-viscous fluids (Reichel et al 2010(Reichel et al , 2011. Different membrane and immersed resonators, using either Lorentz force or piezo actuation, have been developed for viscosity and density measurements on low-viscous fluids (Reichel et al 2009;Clara et al 2016;Lu et al 2017;Lucklum et al 2011). Other examples include parallel plate and waveguide techniques for probing viscosities > 1 Pa•s (Abdallah et al 2016;Kazys et al 2013).…”

Section: Cantilevers and Resonating Viscometersmentioning

confidence: 99%

Bulk rheometry at high frequencies: a review of experimental approaches

et al. 2019

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High-frequency rheology is a form of mechanical spectroscopy which provides access to fast dynamics in soft materials and hence can give valuable information about the local scale microstructure. It is particularly useful for systems where timetemperature superposition cannot be used, when there is a need to extend the frequency range beyond what is possible with conventional rotational devices. This review gives an overview of different approaches to high-frequency bulk rheometry, i.e. mechanical rheometers that can operate at acoustic (20 Hz-20 kHz) or ultrasound (> 20 kHz) frequencies. As with all rheometers, precise control and know-how of the kinematic conditions are of prime importance. The inherent effects of shear wave propagation that occur in oscillatory measurements will hence be addressed first, identifying the gap and surface loading limits. Different high-frequency techniques are then classified based on their mode of operation. They are reviewed critically, contrasting ease of operation with the dynamic frequency range obtained. A comparative overview of the different types of techniques in terms of their operating window aims to provide a practical guide for selecting the right approach for a given problem. The review ends with a more forward looking discussion of selected material classes for which the use of high-frequency rheometry has proven particularly valuable or holds promise for bringing physical insights.

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Section: Cantilevers and Resonating Viscometersmentioning

confidence: 99%

Bulk rheometry at high frequencies: a review of experimental approaches

et al. 2019

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“…This smaller gap and a complete revision of the magnetic circuit yield an enhancement of the magnetic flux density from 150 mT to approximately 0.6 T which quadratically improves the sensor's sensitivity [8].…”

Section: Sensor Principlementioning

confidence: 99%

Double membrane sensors for liquid viscosity and mass density facilitating measurements in a large frequency range

et al. 2010

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A resonating double membrane based sensor for viscosity and mass density facilitating measurements at different frequencies and two adjustable modes of vibration is presented. The sensor is designed to be suitable, e.g., for low cost handheld devices with inline capabilities and disposable sensor elements. In the sensor, a sample liquid is subjected to time harmonic shear stress induced by two opposed vibrating polymer membranes, placed in an external static magnetic field. These membranes carry two conductive paths each. The first path is used to actuate the membranes by means of Lorentz forces while the second acts as a pick-up coil providing an induced voltage representing the movement of the membrane. From the measured frequency response the liquid's viscosity and mass density can be deduced. This double membrane based setup allows to examine the test liquid at adjustable frequencies in the low kilohertz range from 1 kHz to 15 kHz. Two different designs are presented and the results obtained by experimental investigation are compared to previous theoretical findings.

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“…4, where the velocity amplitude along the gap distance is shown over the frequency [4]. For resonator modes exhibiting out-of-plane motion, the fluid displacement can be solved by a potential flow and a correction of the tangential components by a shear wave solution (assuming incompressibility) [5].…”

Section: Theory and Numerical Analysismentioning

confidence: 99%