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- W4383472597 abstract "The perturbation equation for aeroacoustics has been derived in a dissipative medium from the linearized compressible Navier-Stokes equation without any assumption, by expressing the same in spectral plane as in Continuum perturbation field in quiescent ambience: Common foundation of flows and acoustics Sengupta et al., Phys. Fluids,35, 056111 (2023). The governing partial differential equation (PDE) for the free-field propagation of the disturbances in the spectral plane provides the dispersion relation between wavenumber and circular frequency in the dissipative medium, as characterized by a nondimensional diffusion number. Here, the implications of the dispersion relation of the perturbation field in the quiescent medium are probed for different orders of magnitude of the generalized kinematic viscosity, across large ranges of the wavenumber and the circular frequency. The adopted global spectral analysis helps not only classify the PDE into parabolic and hyperbolic types, but also explain the existence of a critical wavenumber depending on space-time scales." @default.
- W4383472597 created "2023-07-07" @default.
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- W4383472597 date "2023-07-04" @default.
- W4383472597 modified "2023-10-18" @default.
- W4383472597 title "Equation for Aeroacoustics in a Quiescent Environment" @default.
- W4383472597 doi "https://doi.org/10.48550/arxiv.2307.01775" @default.
- W4383472597 hasPublicationYear "2023" @default.
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