title: The Micro-Pillar Shear-Stress Sensor MPS(3) for Turbulent Flow.
abstract: 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 MPS(3), 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.
authors.affiliation: Institute of Aerodynamics, RWTH Aachen University, Wüllnerstraße 5a, 52062 Aachen, Germany.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Große
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Schröder