Abstract: In the current jet noise study, an empirical modal decomposition is proposed which distills the noisy and quiet modes of the flow field. In particular, the POD of flows is generalised for an optimal resolution of the far-field noise as opposed to a least-order representation of the hydrodynamic fluctuation level. This decomposition technique, which we call ‘most observable decomposition (MOD)’, is based on a linear cause-eect relationship between the hydrodynamics (cause) and the far-field acoustics (observed eect). In the current study, th...
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Topics: 
Statistical physics
Acoustics