Extreme event detection in near-wall turbulence using reflection-encoded readout of micropillar arrays |
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| Authors: | F Hegner V Mikulich B Axtmann U Rist Ch Brücker |
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| Institution: | 1. Technical University Freiberg, Germany;2. University Stuttgart, Germany |
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| Abstract: | A method is presented which uses the intensity-based encoding of deflection of micropillars to detect criticical events in near-wall turbulence. The pillars are tailored to respond only to the streamwise or the spanwise component of the wall-shear stress with larger deflection. Light reflected from the side-walls of these structures is used to dected certain events in the flow that run along the wall. Examples are given for defined disturbances in a planar Couette flow. (© 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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