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Boundary element and finite element coupling for aeroacoustics simulations

Nolwenn Balin, Fabien Casenave, François Dubois, Eric Duceau, Stefan Duprey, Isabelle Terrasse
2015 Journal of Computational Physics  
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/ fatcat:yzufj5eml5a7xa63jwdwbtxj4m

Time domain computation of flow induced sound

I. Ali, M. Escobar, M. Kaltenbacher, S. Becker
2008 Computers & Fluids  
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

Paul Maurerlehner, Stefan Schoder, Clemens Freidhager, Andreas Wurzinger, Alexander Hauser, Florian Kraxberger, Sebastian Falk, Stefan Kniesburges, Matthias Echternach, Michael Döllinger, Manfred Kaltenbacher
2021 e & i Elektrotechnik und Informationstechnik  
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

A. Mohany, M. Hassan
2013 International Conference on Aerospace Sciences and Aviation Technology  
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]

Stefan J. Schoder, Clemens Junger, Michael Weitz, Manfred Kaltenbacher
2020 arXiv   pre-print
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]

Stefan Schoder, Manfred Kaltenbacher
2020 arXiv   pre-print
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

P. Šidlof, S. Zörner, Petra Dančová, Petr Novontý
2013 EPJ Web of Conferences  
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

Michael Weitz, Stefan Schoder, Paul Maurerlehner, Sebastian Falk, Michael Döllinger, Manfred Kaltenbacher
2019 Proceedings of the ICA congress  
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

W. Schröder
2004 Journal of Sound and Vibration  
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

Jubiao Yang, Feimi Yu, Michael Krane, Lucy T. Zhang
2018 Journal of Fluids and Structures  
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

Daniel Urbán Dagmara Čeheľová
2018 Zenodo  
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

Yinzhi He, Zihao Shi, Yu Wu, Zhigang Yang
2018 Shock and Vibration  
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

Stefan Schoder, Paul Maurerlehner, Andreas Wurzinger, Alexander Hauser, Sebastian Falk, Stefan Kniesburges, Michael Döllinger, Manfred Kaltenbacher
2021 Applied Sciences  
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

Jens Grabinger, Branimir Karic, Simon Triebenbacher, Manfred Kaltenbacher, Stefan Becker, Reinhard Lerch
2008 Journal of the Acoustical Society of America  
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

Andreas Hüppe, Gary Cohen, Sébastien Imperiale, Manfred Kaltenbacher
2016 Communications in Computational Physics  
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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