Modal Decomposition of Synthetic Jet Flow Based on CFD Computation

Abstract

Abstract. The article analyzes results of numerical simulation of synthetic jet flow using modal decomposition. The analyzes are based on the numerical simulation of axisymmetric unsteady laminar flow obtained using ANSYS Fluent CFD code. Three typical laminar regimes are compared from the point of view of modal decomposition. The first regime is without synthetic jet creation with Reynolds number Re = 76 and Stokes number S = 19.7. The second studied regime is defined by Re = 145 and S = 19.7. The third regime of synthetic jet work is regime with Re = 329 and S = 19.7. Modal decomposition of obtained flow fields is done using proper orthogonal decomposition (POD) where energetically most important modes are identified. The structure of POD modes is discussed together with classical approach based on phase averaged velocities.

Evaluation of Travelling Vortex Speed by Means of Dynamic Mode Decomposition and Residual Vorticity

“…Current work is dealing with the analysis of unsteady flow field with travelling vortex ring and from the point of view of modal decomposition is continuation of e.g. the works [1,2]. From the point of view of analysis of synthetic jet flow it is indirect visualization method unlike the works [3,4], where is the subject of synthetic jet flow studied by using direct visualization.…”