Reduced order models for EHD controlled wake flow

J. D'ADAMO; R SOSA; A CAMMILLERI; G ARTANA

Journal of Physics: Conference Series

IOP

Año: 2009 vol. 166 p. 1 - 10

1742-6588

 We present in this work a way to construct reduced order model (ROM) for wakeflows at low Reynolds numbers, from experimental data of particle image velocimetry (PIV).The proper orthogonal decomposition method (POD) allows the extraction of a small numberof functions or modes that describes the flow velocity field. Galerkin projection of Navier Stokesequations onto these modes leads to obtain a system of ordinary equations, the reduced ordermodel. We take interest particularly in the study of the modications introduced by anelectrohydrodynamic (EHD) actuator on the flow. EHD action is obtained from a gaseousdischerge of dielectric barrier type (DBD), produced by electrodes flush mounted on a cylindersurface. The reduced order model presents as an eective tool in order to analyse the coupledelectrical and hydrodynamic phenomena. We focus on the flow changes considering the voltagebetween the electrodes as a control parameter.