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Aeolian tone generation during flow past circular cylinder in the presence of splitter plate has been numerically investigated at different Reynolds numbers. Compressible Navier-Stokes equations have been solved using combination of optimized coupled compact difference (OCCD) DRP scheme and five stage Runge-Kutta time integration scheme. Effects of splitter plate positions on the sound generation and its propagation have been investigated. Furthermore, acoustic, thermal and hydrodynamic modes have been evaluated from DNS flow field using Doak's decomposition theory. Proper orthogonal decomposition (POD) analysis has been applied on fluctuating pressure fields to investigate dominated modes of energy present in the sound field. In the present computations, O-grid topology has been adopted to generate refined mesh inside computational domain.
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