Abstract
The implementation of viscous and thermal losses using the Boundary Element Method (BEM) is based on the Kirchhoff’s dispersion relation and has been tested in previous work using analytical test cases and comparison with measurements. Numerical methods that can simulate sound fields in fluids including losses are particularly interesting whenever small cavities and narrow passages are present, as is the case with many acoustic devices such as transducers and small audio appliances.
The present paper describes current work aimed at improving the method by addressing some specific issues related with mesh definition, geometrical singularities and treatment of closed cavities. These issues are specific of the BEM with losses. Using examples, some strategies are presented that can alleviate shortcomings and improve performance.
The present paper describes current work aimed at improving the method by addressing some specific issues related with mesh definition, geometrical singularities and treatment of closed cavities. These issues are specific of the BEM with losses. Using examples, some strategies are presented that can alleviate shortcomings and improve performance.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of 43rd International Congress on Noise Control Engineering : Internoise 2014 |
| Editors | John Davy, Charles Don, Terry McMinn, Liz Dowsett, Norm Broner, Marion Burgess |
| Number of pages | 8 |
| Place of Publication | Melbourne, Australia |
| Publisher | The Australian Acoustical Society |
| Publication date | 16 Nov 2014 |
| Article number | 858 |
| ISBN (Electronic) | 978-0-909882-04-4 |
| Publication status | Published - 16 Nov 2014 |
| Externally published | Yes |