A direct-hybrid CFD/CAA method based on lattice Boltzmann and acoustic perturbation equations
The accuracy of two direct coupled two-step CFD/CAA methods is discussed. For the flow field either a finite-volume (FV) method for the solution of the Navier–Stokes equations or a lattice Boltzmann (LB) method is coupled to a discontinuous Galerkin (DG) method for the solution of the acoustic pertu...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | Acta Acustica |
| Subjects: | |
| Online Access: | https://acta-acustica.edpsciences.org/articles/aacus/full_html/2023/01/aacus220028/aacus220028.html |
| _version_ | 1797705018163331072 |
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| author | Gondrum Miro Satcunanathan Sutharsan Niemöller Ansgar Meinke Matthias Schröder Wolfgang |
| author_facet | Gondrum Miro Satcunanathan Sutharsan Niemöller Ansgar Meinke Matthias Schröder Wolfgang |
| author_sort | Gondrum Miro |
| collection | DOAJ |
| description | The accuracy of two direct coupled two-step CFD/CAA methods is discussed. For the flow field either a finite-volume (FV) method for the solution of the Navier–Stokes equations or a lattice Boltzmann (LB) method is coupled to a discontinuous Galerkin (DG) method for the solution of the acoustic perturbation equations. The coupling takes advantage of a joint Cartesian mesh allowing for the exchange of the acoustic sources without MPI communication. An immersed boundary treatment of the acoustic scattering from solid bodies by a novel solid wall formulation is implemented and validated in the DG method. Results for the case of a spinning vortex pair and the low Reynolds number unsteady flow around a circular cylinder show that a solution with comparable accuracy is obtained for the two direct-hybrid methods when using identical mesh resolution. |
| first_indexed | 2024-03-12T05:29:02Z |
| format | Article |
| id | doaj.art-cf176b0786de421bb1200feaf2b82dfa |
| institution | Directory Open Access Journal |
| issn | 2681-4617 |
| language | English |
| last_indexed | 2024-03-12T05:29:02Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Acta Acustica |
| spelling | doaj.art-cf176b0786de421bb1200feaf2b82dfa2023-09-03T07:00:32ZengEDP SciencesActa Acustica2681-46172023-01-017510.1051/aacus/2022062aacus220028A direct-hybrid CFD/CAA method based on lattice Boltzmann and acoustic perturbation equationsGondrum Miro0https://orcid.org/0000-0002-2796-6644Satcunanathan Sutharsan1Niemöller Ansgar2https://orcid.org/0000-0001-7169-4167Meinke Matthias3Schröder Wolfgang4Chair of Fluid Mechanics and Institute of Aerodynamics, RWTH Aachen UniversityChair of Fluid Mechanics and Institute of Aerodynamics, RWTH Aachen UniversityChair of Fluid Mechanics and Institute of Aerodynamics, RWTH Aachen UniversityChair of Fluid Mechanics and Institute of Aerodynamics, RWTH Aachen UniversityChair of Fluid Mechanics and Institute of Aerodynamics, RWTH Aachen UniversityThe accuracy of two direct coupled two-step CFD/CAA methods is discussed. For the flow field either a finite-volume (FV) method for the solution of the Navier–Stokes equations or a lattice Boltzmann (LB) method is coupled to a discontinuous Galerkin (DG) method for the solution of the acoustic perturbation equations. The coupling takes advantage of a joint Cartesian mesh allowing for the exchange of the acoustic sources without MPI communication. An immersed boundary treatment of the acoustic scattering from solid bodies by a novel solid wall formulation is implemented and validated in the DG method. Results for the case of a spinning vortex pair and the low Reynolds number unsteady flow around a circular cylinder show that a solution with comparable accuracy is obtained for the two direct-hybrid methods when using identical mesh resolution.https://acta-acustica.edpsciences.org/articles/aacus/full_html/2023/01/aacus220028/aacus220028.htmlcomputational aeroacousticslattice boltzmannacoustic perturbation equationsimmersed boundary method |
| spellingShingle | Gondrum Miro Satcunanathan Sutharsan Niemöller Ansgar Meinke Matthias Schröder Wolfgang A direct-hybrid CFD/CAA method based on lattice Boltzmann and acoustic perturbation equations Acta Acustica computational aeroacoustics lattice boltzmann acoustic perturbation equations immersed boundary method |
| title | A direct-hybrid CFD/CAA method based on lattice Boltzmann and acoustic perturbation equations |
| title_full | A direct-hybrid CFD/CAA method based on lattice Boltzmann and acoustic perturbation equations |
| title_fullStr | A direct-hybrid CFD/CAA method based on lattice Boltzmann and acoustic perturbation equations |
| title_full_unstemmed | A direct-hybrid CFD/CAA method based on lattice Boltzmann and acoustic perturbation equations |
| title_short | A direct-hybrid CFD/CAA method based on lattice Boltzmann and acoustic perturbation equations |
| title_sort | direct hybrid cfd caa method based on lattice boltzmann and acoustic perturbation equations |
| topic | computational aeroacoustics lattice boltzmann acoustic perturbation equations immersed boundary method |
| url | https://acta-acustica.edpsciences.org/articles/aacus/full_html/2023/01/aacus220028/aacus220028.html |
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