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Sensors 2008, 8(4), 2707-2721; doi:10.3390/s8042707

Working Principle Simulations of a Dynamic ResonantWall Shear Stress Sensor Concept

Mechanical Department, University of Wyoming, USA; Laboratory for Shock Wave and Detonation
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Author to whom correspondence should be addressed.
Received: 26 November 2007 / Accepted: 1 April 2008 / Published: 17 April 2008
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Abstract

This paper discusses a novel dynamic resonant wall shear stress sensor concept based on an oscillating sensor operating near resonance. The interaction between the oscillating sensor surface and the fluid above it is modelled using the unsteady laminar boundary layer equations. The numerical experiment shows that the effect of the oscillating shear stress is well correlated by the Hummer number, the ratio of the steady shear force caused by the outside flow to the oscillating viscous force created by the sensor motion. The oscillating shear stress predicted by the fluid model is used in a mechanical model of the sensor to predict the sensor’s dynamic motion. Static calibration curves for amplitude and frequency influences are predicted. These results agree with experimental results on some extent, and shows some expectation for further development of the dynamic resonant sensor concept. View Full-Text
Keywords: dynamic resonant shear stress sensor; Hummer number; fluid and mechanical model dynamic resonant shear stress sensor; Hummer number; fluid and mechanical model
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Zhang, X.; Naughton, J.W.; Lindberg, W.R. Working Principle Simulations of a Dynamic ResonantWall Shear Stress Sensor Concept. Sensors 2008, 8, 2707-2721.

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