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Boundary element and finite element coupling for aeroacoustics simulations
2015
Journal of Computational Physics
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The well-known setting of boundary element method for the Helmholtz equation is available. ...
Herein, we carry out the coupling of these two methods and present various applications and validation test cases. ...
The authors would like to express their gratitude to Toufic Abboud (IMACS), Patrick Joly (INRIA) and Guillaume Sylvand (Airbus Group) for fruitful discussions and to Emilie Peynaud and François Madiot ...
doi:10.1016/j.jcp.2015.03.044
fatcat:yzufj5eml5a7xa63jwdwbtxj4m
Time domain computation of flow induced sound
2008
Computers & Fluids
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Therewith, we solve the flow field by a large eddy simulation (LES) and the generation as well as propagation of acoustic noise by Lighthill's analogy applying the finite element method. ...
We present a recently developed numerical scheme for computational aeroacoustics (CAA). ...
Acknowledgements The research work was conceived and is supervised by the head of LSTM, Prof. ...
doi:10.1016/j.compfluid.2007.02.011
fatcat:qkjocha4mzbrjelmvtzfxuq3te
Efficient numerical simulation of the human voice
2021
e & i Elektrotechnik und Informationstechnik
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An analysis of the computational workloads suggests that the key factor for a further increase in efficiency is an optimized flow simulation and source term computation. ...
However, such numerical models involve complex and demanding procedures to model the material behavior and the mechanical contact of the vocal folds and to realize moving boundaries of the involved physical ...
Acknowledgements The authors acknowledge support from the German Research Foundation (DFG) under DO 1247/10-1 (no. 391215328) and the Austrian Research Council (FWF) under no. I 3702. ...
doi:10.1007/s00502-021-00886-1
fatcat:cwobmsqd6zafjp5ewwgtyzy74u
Flow-Sound Interaction Mechanism of Two Side-by-Side Cylinders in Cross-Flow
2013
International Conference on Aerospace Sciences and Aviation Technology
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This simulation is then coupled with a finite element simulation of the resonant sound field, by means of Howe's theory of aerodynamics sound, to reveal the details of flow-sound interaction mechanisms ...
, including the nature and the locations of the aeroacoustic sources in the flow field. ...
Acoustic Field A numerical simulation was performed to model the resonant sound field with the aid of the finite-element analysis in ABAQUS. ...
doi:10.21608/asat.2013.22122
fatcat:ia4lqxquobfvniiwbskr2ppyv4
Conservative interpolation of aeroacoustic sources in a hybrid workflow applied to fan
[article]
2020
arXiv
pre-print
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In low Mach number aeroacoustics, the well known disparity of scales makes it possible to apply efficient hybrid simulation models using different meshes for flow and acoustics, which leads to a powerful ...
In general, hybrid aeroacoustic methods seek for robust and conservative mesh-to-mesh transformation of the aeroacoustic sources while high computational efficiency is ensured. ...
Besides acoustic finite element simulations, similar investigations have been performed in [4] , where for both the flow and the acoustic field, a finite volume (FV) scheme has been used. ...
arXiv:2009.02341v1
fatcat:up573vlt45d25kfu7rx6qlk5ue
Aeroacoustic source term filtering based on Helmholtz decomposition
[article]
2020
arXiv
pre-print
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Hybrid aeroacoustic methods seek for computational efficiency and robust noise prediction. ...
The capabilities are illustrated for the aeroacoustic benchmark case, "cavity with a lip", involving acoustic feedback. ...
potential requires a finite element discretization with edge elements (Nédélec elements). ...
arXiv:2006.03276v1
fatcat:ja3sglbym5eevl6bqugo2pw64i
Computational aeroacoustics of human phonation
2013
EPJ Web of Conferences
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To capture the fine turbulent scales important for the acoustic source calculations, the equations are discretized and solved on large computational meshes up to 3.2M elements. ...
This is done with the research code CFS++ which employs the finite element method (FEM). ...
Acknowledgements The research has been supported by the Czech Science Foundation, project P101/11/0207 Coupled problems of fluid and solid mechanics -nonlinear aeroelasticity, within the research plan ...
doi:10.1051/epjconf/20134501085
fatcat:jie6lciidfby5nl2yygzemdftm
Acoustic Source Term Interpolation in Hybrid Aeroacoustic Simulation of Human Phonation
2019
Proceedings of the ICA congress
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We follow a hybrid aeroacoustic approach, which performs in a first step an incompressible flow simulation on a computational grid which is capable of resolving all relevant turbulent scales. ...
Finally, we validate the simulation results with results obtained from measurements. ...
ACKNOWLEDGEMENTS The authors acknowledge support from the German Research Foundation (DFG) under DO 1247/10-1 (no. 391215328) and the Austrian Research Council (FWF) under no. I 3702. ...
doi:10.18154/rwth-conv-239325
fatcat:etgunxgcorcztgjm74i7ymsfzq
Aeroacoustics research in Europe: The CEAS-ASC report on 2003 highlights
2004
Journal of Sound and Vibration
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This is a report on some highlights of aeroacoustics research in Europe in ...
Monika Wiechol for her contribution to the production of this paper. ...
That is, the cpu-time consuming evaluation of the integration, which is required for the cross-correlation of the loads among any couple of finite elements or grid points, is avoided. ...
doi:10.1016/j.jsv.2004.06.002
fatcat:cr55ikyiyjhqbmytrg66pzctd4
The Perfectly Matched Layer absorbing boundary for fluid–structure interactions using the Immersed Finite Element Method
2018
Journal of Fluids and Structures
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framework, the Immersed Finite Element Method. ...
The performance of the PML boundary condition is evaluated and compared to reference solutions with a variety of benchmark test cases including known and expected solutions of aeroacoustic wave propagation ...
Finally, the computational resources at the Center for Computational Innovations at Rensselaer Polytechnic Institute are greatly appreciated. ...
doi:10.1016/j.jfluidstructs.2017.09.002
pmid:29151673
pmcid:PMC5688520
fatcat:mga63govwvhsbeenjxnrv4ip5y
Literature Review On Wind Induced Sound On Buildings
2018
Zenodo
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Aeroacoustics is a scientific field that has been for many years explored in different kinds of engineering, in automotive and aerospace industry, in duct design or jets and turbine construction and other ...
Nowadays, due to new types of building constructions and elements (e.g. different shading elements) installed on high-rise buildings (causing high windspeeds on the building facade) questions related to ...
Lele [20] provided summary of artifacts inherent in numerical simulations influenced by various boundary conditions. ...
doi:10.5281/zenodo.1174250
fatcat:2mh2tfwv7ff4dguxdpaqqqqz6a
Sound Radiation Analysis of a Front Side Window Glass of DrivAer Model under Wind Excitation
2018
Shock and Vibration
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Firstly, the constraint boundary condition of the side glass was set equivalent to a series of springs for the modelling with Finite Element Method (FEM). ...
Subsequently, the finite element modal superposition method was used to solve the vibroacoustic coupling equation to get the noise level of the driver's ear position in the vehicle interior. ...
Acknowledgments e authors are grateful for the grants from National Natural Science Foundation of China (51575394). ...
doi:10.1155/2018/5828725
fatcat:yskhlmzlbfhmrn47tohwfy76ge
Aeroacoustic Sound Source Characterization of the Human Voice Production-Perturbed Convective Wave Equation
2021
Applied Sciences
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In the first step, the validated 3D incompressible turbulent flow simulation is computed by the finite volume method using STARCCM+. ...
Additionally, the wave equation is solved with the finite element solver openCFS to obtain the 3D sound field in the acoustic far-field. ...
This model coupled the immersed boundary method for incompressible flow to a finite element solver. ...
doi:10.3390/app11062614
fatcat:kecm2wdhpne6ho2cqmhfgjviqm
Prediction of flow induced noise in rotating devices using nonmatching grids
2008
Journal of the Acoustical Society of America
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The coupling between these two parts is enforced at their interface by a mortar finite element method, which uses Lagrange multipliers in order to "glue" the geometrically independent parts together. ...
The objective of our contribution is to simulate the generation as well as the propagation of noise inside of rotating devices. ...
Finite Element Formulation
Weak Problem Formulation In the following we omit the absorbing boundary and initial conditions for ease of presentation, and refer to [4] for details on this issue. ...
doi:10.1121/1.2934515
fatcat:w4az3qnfx5co5ibhzekgmozw6y
Construction and Analysis of an Adapted Spectral Finite Element Method to Convective Acoustic Equations
2016
Communications in Computational Physics
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AbstractThe paper addresses the construction of a non spurious mixed spectral finite element (FE) method to problems in the field of computational aeroacoustics. ...
A study of convergence and an application of the proposed scheme to simulate the flow induced sound generation in the process of human phonation underlines stability and validity. ...
Figure 13 : 13 Contours of acoustic pressure at the end of the simulation run for coarsest grid, 7th order elements and utilization of adapative visualization in gmsh. ...
doi:10.4208/cicp.250515.161115a
fatcat:fqspvuzekjfdzeuandm3kvl4qq
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