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Real-Time Reconstruction of Separated Flow Flapping Motion

Abstract : The ability of electrochemical sensors to properly measure wall-shear stress is here considered to use them as potential candidates for time-resolved estimation of a large-scale activity occurring at the flow separation region downstream a bump. The inflow Reynolds number considered, based on the channel full height and the incoming bulk velocity, is Reb=1735 . The methodology implemented consists in combining the electrochemical sensors with Piv measurements and to build an estimation model of a low-order representation of the flow field. This estimation model is based on a multi-time reformulation of the complementary technique originally introduced by Bonnet et al. (Exp Fluids 17(5):307–314, 1994 [1]). The present paper shows the potential of electrochemical sensors for properly resolving the low-frequency flapping mode whose control was recently shown by Gautier et al. (J Fluid Mech 770:442–457, 2015 [2]), and its potential as a candidate to significantly reduce separation.
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Submitted on : Thursday, November 25, 2021 - 10:40:06 AM
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Fawzi Fadla, Anthony Graziani, Franck Kerhervé, Romain Mathis, Marc Lippert, et al.. Real-Time Reconstruction of Separated Flow Flapping Motion. Turbulence and Interactions, 135, Springer International Publishing, pp.131-137, 2018, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 978-3-319-60387-2. ⟨10.1007/978-3-319-60387-2_13⟩. ⟨hal-03448466⟩



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