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Viscous effects on the attenuation of a plane wave by an acoustic lining in shear flow
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Khamis, Doran and Brambley, Edward J. (James) (2017) Viscous effects on the attenuation of a plane wave by an acoustic lining in shear flow. The Journal of the Acoustical Society of America, 141 (4). pp. 2408-2417. doi:10.1121/1.4979469
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Official URL: http://dx.doi.org/10.1121/1.4979469
Abstract
The attenuation of a plane acoustic wave incident on a flat impedance surface in a sheared and viscous fluid is investigated numerically and asymptotically. Predictions of various boundary models of impedance surfaces in shear flow are tested by comparing their predicted reflection coefficient. It is found that viscosity has a significant effect, reducing the reflection of upstream propagating sound while increasing the reflection of cross-stream propagating sound. The classical Ingard-Myers boundary condition is shown to incorrectly predict the damping rate of sound in many cases, and in some cases viscous effects are shown to be comparable to shear effects.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QA Mathematics T Technology > TA Engineering (General). Civil engineering (General) |
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| Divisions: | Faculty of Science > Mathematics Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) |
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| Library of Congress Subject Headings (LCSH): | Viscous flow -- Mathematical models, Shear flow | ||||||||
| Journal or Publication Title: | The Journal of the Acoustical Society of America | ||||||||
| Publisher: | Acoustical Society of America | ||||||||
| ISSN: | 0001-4966 | ||||||||
| Official Date: | 6 April 2017 | ||||||||
| Dates: |
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| Volume: | 141 | ||||||||
| Number: | 4 | ||||||||
| Page Range: | pp. 2408-2417 | ||||||||
| DOI: | 10.1121/1.4979469 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Funder: | Royal Society (Great Britain). University Research Fellowship, Engineering and Physical Sciences Research Council (EPSRC) |
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