Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Dynamic Mode Decomposition of Synthetic Jet Flow at Re = 329 and S = 19.7
Hyhlík T.
Abstract:
This work uses dynamic mode decomposition (DMD) to analyze numerical simulation of axisymmetric vortex street like structure with traveling vortex ring which is connected with synthetic jet creation. The regime of synthetic jet with Reynolds number Re = 329 and Stokes number S = 19:7 is studied. The analysis is based on the numerical simulation of axisymmetric unsteady laminar ow obtained using ANSYS Fluent CFD code. The theory behind DMD is partly introduced. The structure of DMD modes corresponding to quasi-periodic vortex street is discussed.
Keywords:
synthetic jet, modal decomposition, dynamic mode decomposition

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In Proceedings Topical Problems of Fluid Mechanics 2015, Prague, 2015 Edited by David Šimurda and Tomáš Bodnár, pp. 71-76 ISBN 978-80-87012-55-0 (Print) ISSN 2336-5781 (Print)