Publication Details

A coupled simulation approach for ﬂuid-structure-acoustic interactions is presented, which considers both the ﬂow-induced sound and the sound due to structural vibrations. The proposed computation scheme is based on a partitioned approach that uses different simulation codes for the ﬂow simulation and the structural and acoustic computations. The ﬂow simulation is done by an in-house ﬁnite-volume code solving the incompressible Navier- Stokes equations in space and time. For the structural mechanics computations, an in-house ﬁnite-element multi- physics code is applied, which is also able to solve the acoustic wave equation describing the wave propagation to the far ﬁeld. An implicit coupling scheme with sub-iterations in each time step is employed for ﬂuid-structure interaction. The computation of the aeroacoustic sound is based on Lighthill’s theory. The structural-acoustic coupling is realized by applying appropriate boundary conditions to the acoustic wave equation. The above-described methodology is applied to a simpliﬁed model of a car underbody. The acoustic ﬁeld due to the interaction of a thin, ﬂexible plate representing coverings of the car underbody and a turbulent ﬂow is investigated. The ﬂexible plate is part of an otherwise rigid wall that is overﬂown by air. To model obstacles typically found at real car underbodies, a square cylinder is placed upstream of the ﬂexible plate. The Reynolds number of the ﬂow based on the free stream veloctiy and the obstacle height is 26 000.

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How to cite

APA: Uffinger, T., Schäfer, F., Becker, S., Grabinger, J., & Kaltenbacher, M. (2009). Fluid-Structure-Acoustic Interaction of a Thin, Flexible Plate in the Wake of a Wall Mounted Square Cylinder. In Meister A, Hartmann S, Schäfer M, Turek S (Eds.), International Workshop on Fluid-Structure Interaction - Theory, Numerics and Applications (pp. 253-264). Kassel University Press. |

MLA: Uffinger, Thomas, et al. "Fluid-Structure-Acoustic Interaction of a Thin, Flexible Plate in the Wake of a Wall Mounted Square Cylinder." International Workshop on Fluid-Structure Interaction - Theory, Numerics and Applications Ed. Meister A, Hartmann S, Schäfer M, Turek S, Kassel University Press, 2009. 253-264. |