title: Noise source identification with the lattice Boltzmann method.
abstract: In this paper the sound source identification problem is addressed with the use of the lattice Boltzmann method. To this aim, a time-reversed problem coupled to a complex differentiation method is used. In order to circumvent the inherent instability of the time-reversed lattice Boltzmann scheme, a method based on a split of the lattice Boltzmann equation into a mean and a perturbation component is used. Lattice Boltzmann method formulation around an arbitrary base flow is recalled and specific applications to acoustics are presented. The implementation of the noise source detection method for two-dimensional weakly compressible (low Mach number) flows is discussed, and the applicability of the method is demonstrated.
authors: Université Pierre et Marie Curie (UPMC), Paris 06 UMR 7190, Institut Jean Le Rond d'Alembert, F-75005 Paris, France. etienne.vergnault@univ-lyon1.fr
authors: Etienne
authors: E
authors: Vergnault
authors: Orestis
authors: O
authors: Malaspinas
authors: Pierre
authors: P
authors: Sagaut
mesh_terms: D000162:Acoustics; D003198:Computer Simulation; D008962:Models, Theoretical; D009038:Motion; D009622:Noise; D009716:Numerical Analysis, Computer-Assisted; D011312:Pressure; D012815:Signal Processing, Computer-Assisted; D013018:Sound Spectrography; D013997:Time Factors