Reduced order models for EHD controlled wake flow

4. J. D’ADAMO, R. SOSA AND G. ARTANA

Santa Fe Argentina

Conferencia; FLUIDOS 2008; 2008

INTEC

We present in this work a way to construct reduced order model (ROM) for wake ows at low Reynolds numbers, from experimental data of particle image velocimetry (PIV). The proper orthogonal decomposition method (POD) allows the extraction of a small number of functions or modes that describes the ow velocity eld. Galerkin projection of Navier Stokes equations onto these modes leads to obtain a system of ordinary equations, the reduced order model. We take interest particularly in the study of the modi cations introduced by an electrohydrodynamic (EHD) actuator on the ow. EHD action is obtained from a gaseous discherge of dielectric barrier type (DBD), produced by electrodes ush mounted on a cylinder surface. The reduced order model presents as an eective tool in order to analyse the coupled electrical and hydrodynamic phenomena. We focus on the ow changes considering the voltage between the electrodes as a control parameter.