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Sensors 2009, 9(4), 2222-2251; doi:10.3390/s90402222

The Micro-Pillar Shear-Stress Sensor MPS3 for Turbulent Flow

Institute of Aerodynamics, RWTH Aachen University, Wüllnerstraße 5a, 52062 Aachen, Germany
Laboratory for Aero and Hydrodynamics, Delft University of Technology, 2628 CA Delft, The Netherlands
Author to whom correspondence should be addressed.
Received: 9 January 2009 / Revised: 25 March 2009 / Accepted: 26 March 2009 / Published: 30 March 2009
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Germany)
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Wall-shear stress results from the relative motion of a fluid over a body surface as a consequence of the no-slip condition of the fluid in the vicinity of the wall. To determine the two-dimensional wall-shear stress distribution is of utter importance in theoretical and applied turbulence research. In this article, characteristics of the Micro-Pillar Shear-Stress Sensor MPS3, which has been shown to offer the potential to measure the two-directional dynamic wall-shear stress distribution in turbulent flows, will be summarized. After a brief general description of the sensor concept, material characteristics, possible sensor-structure related error sources, various sensitivity and distinct sensor performance aspects will be addressed. Especially, pressure-sensitivity related aspects will be discussed. This discussion will serve as ‘design rules’ for possible new fields of applications of the sensor technology.
Keywords: Fluid Mechanics; Turbulence; Wall-Shear Stress; Skin Friction; Micro-Pillar Shear-Stress Sensor MPS³ Fluid Mechanics; Turbulence; Wall-Shear Stress; Skin Friction; Micro-Pillar Shear-Stress Sensor MPS³
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Große, S.; Schröder, W. The Micro-Pillar Shear-Stress Sensor MPS3 for Turbulent Flow. Sensors 2009, 9, 2222-2251.

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