Abstract
A high-order Cartesian-grid finite-volume method for aeroacoustics simulations
The Journal of the Acoustical Society of America, Vol.136(4), pp.2224-2224
10/2014
DOI: 10.1121/1.4900077
Abstract
A moving-least-square based finite-volume method is developed to simulate acoustic wave propagation and scattering from complicated solid geometries. This hybrid method solves the linearized perturbed compressible equations as the governing equations of the acoustic field. The solid boundaries are embedded in a uniform Cartesian grid and represented using level set fields. Thus, the current approach avoids unstructured grid generation for the irregular geometries. The desired boundary conditions are imposed sharply on the immersed boundaries using a ghost fluid method. The scope of the implementation of the moving moving-least-square approach in the current solver is threefold: reconstruction of the field variables on cell faces for high-order flux construction, population of the ghost cells based on the desired boundary condition, and filtering the high wave number modes near the immersed boundaries. The computational stencils away from the boundaries are identical; hence, only one moving-least-square shape-function is computed and stored with its underlying grid pattern for all the interior cells. This feature significantly reduces the memory requirement of the acoustic solver compared to similar finite-volume method on irregular unstructured mesh. The acoustic solver is validated against several benchmark problems.
Details
- Title: Subtitle
- A high-order Cartesian-grid finite-volume method for aeroacoustics simulations
- Creators
- Mehrdad H FarahaniJohn MouselSarah Vigmostad
- Resource Type
- Abstract
- Publication Details
- The Journal of the Acoustical Society of America, Vol.136(4), pp.2224-2224
- DOI
- 10.1121/1.4900077
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Language
- English
- Date published
- 10/2014
- Academic Unit
- Surgery; Mechanical Engineering; Roy J. Carver Department of Biomedical Engineering
- Record Identifier
- 9984064594702771
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