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- W2317081585 abstract "The use of poroelastic materials on the surfaces under flows–part of the Collaborative Research SFB 880, “Fundamentals of high-lift for future commercial aircrafts”– is investigated. Besides the positive influence that porous surfaces have on aeroacoustics, a poroelastic layer may also help reduce the impact sound. An approach to model the interface between a flow and a poroelastic material, which tracks the propagation of flow-induced structure-borne sound into the poroelastic medium, is illustrated. Firstly, the overall simulation approach and the selected material model is presented, followed by an explanation of the coupling conditions for the interface between the fluid and the poroelastic material. To illustrate the plausibility of this coupling, flow-induced structure-borne sound entry into an airfoil-like structure, layered with a porous material, is examined. The analysis is carried out on a finite element method-based in-house code. MODELING The Navier-Stokes equations constitute the basic equations of fluid mechanics and state conservation of mass, momentum and energy. The viscosity is taken into account by the Stokes friction approach, which is a generalization of Newton’s first law of motion. Assuming an incompressible fluid, the Navier-Stokes equations simplify to ∂vi ∂xi =0 (1)" @default.
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- W2317081585 date "2013-06-18" @default.
- W2317081585 modified "2023-09-26" @default.
- W2317081585 title "Modeling of Flow-Induced Sound in Poroelastic Materials" @default.
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- W2317081585 doi "https://doi.org/10.1061/9780784412992.106" @default.
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