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Analysis of the filtering effect of the stochastic estimation and accuracy improvement by sensor location optimization

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2016
auteur(s) Arnault Anthony; Dandois Julien; Monnier J.C.; Delva J.; Foucaut Jean-Marc
journal (abréviation) Experiments in Fluids (Exp Fluid)
volume (numéro) 57 (12)
numéro de papier 185
  
résumé The reconstruction of the flow behind a backward-facing step at a Reynolds number of 60,000 using linear stochastic estimation (LSE) and modified LSE (with or without multi-time-delay) is investigated. In particular, the turbulent spatial integral length scales estimated for several sensor configurations are studied. The estimation of the proper orthogonal decomposition (POD) modes is also performed in order to show the limitations of the SE for complex flows, for which taking into account only a few POD modes may not be enough to represent the flow dynamics. The importance of the sensor locations on the estimation is also emphasized, and the opportunity to use a sensor location optimization algorithm is investigated.
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