Visco-thermal effects on an acoustic cloak based on scattering cancellation

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedings – Annual report year: 2018Researchpeer-review

Standard

Visco-thermal effects on an acoustic cloak based on scattering cancellation. / Andersen, Peter Risby; Cutanda Henriquez, Vicente; Aage, Niels; Sánchez-Dehesa, Jose .

Proceedings of NOise and Vibration Emerging Methods. 2018. 171971.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedings – Annual report year: 2018Researchpeer-review

Harvard

Andersen, PR, Cutanda Henriquez, V, Aage, N & Sánchez-Dehesa, J 2018, Visco-thermal effects on an acoustic cloak based on scattering cancellation. in Proceedings of NOise and Vibration Emerging Methods., 171971, NOise and Vibration Emerging Methods, Santa Eulalia des Riu, Spain, 07/05/2018.

APA

Andersen, P. R., Cutanda Henriquez, V., Aage, N., & Sánchez-Dehesa, J. (2018). Visco-thermal effects on an acoustic cloak based on scattering cancellation. In Proceedings of NOise and Vibration Emerging Methods [171971]

CBE

Andersen PR, Cutanda Henriquez V, Aage N, Sánchez-Dehesa J. 2018. Visco-thermal effects on an acoustic cloak based on scattering cancellation. In Proceedings of NOise and Vibration Emerging Methods.

MLA

Andersen, Peter Risby et al. "Visco-thermal effects on an acoustic cloak based on scattering cancellation". Proceedings of NOise and Vibration Emerging Methods. 2018.

Vancouver

Andersen PR, Cutanda Henriquez V, Aage N, Sánchez-Dehesa J. Visco-thermal effects on an acoustic cloak based on scattering cancellation. In Proceedings of NOise and Vibration Emerging Methods. 2018. 171971

Author

Bibtex

@inproceedings{9fb1578e1c9b48419dc842f3f0d06b46,
title = "Visco-thermal effects on an acoustic cloak based on scattering cancellation",
abstract = "Recent research has shown that the performance of acoustic metamaterials can be greatly influenced by the effects of viscous and thermal dissipation. In the worst case, an isentropic assumption can lead to an undesired performance. To further investigate the impact of losses on novel acoustic devices, an already known acoustic cloak is validated numerically, including the viscous and thermal dissipation effects. The specific cloaking device is realized using 120 small aluminium cylinders distributed around a larger cylindrical object, in such a way, that plane waves incident to the cloak will appear to be undisturbed, at the operational frequency of 3061 Hz. The initial optimization procedure for determining the positions of the small cylinders assumes isentropic conditions neglecting dissipative effects, meaning that the actual realization of the cloak might behave differently than intended. Through numerical simulations the acoustic cloak performance is compared with and without dissipation, giving an estimate of the differences that can be expected in similar cases. The results show that losses have very little impact on the key performance characteristic, the averaged visibility.",
author = "Andersen, {Peter Risby} and {Cutanda Henriquez}, Vicente and Niels Aage and Jose S{\'a}nchez-Dehesa",
year = "2018",
language = "English",
booktitle = "Proceedings of NOise and Vibration Emerging Methods",

}

RIS

TY - GEN

T1 - Visco-thermal effects on an acoustic cloak based on scattering cancellation

AU - Andersen, Peter Risby

AU - Cutanda Henriquez, Vicente

AU - Aage, Niels

AU - Sánchez-Dehesa, Jose

PY - 2018

Y1 - 2018

N2 - Recent research has shown that the performance of acoustic metamaterials can be greatly influenced by the effects of viscous and thermal dissipation. In the worst case, an isentropic assumption can lead to an undesired performance. To further investigate the impact of losses on novel acoustic devices, an already known acoustic cloak is validated numerically, including the viscous and thermal dissipation effects. The specific cloaking device is realized using 120 small aluminium cylinders distributed around a larger cylindrical object, in such a way, that plane waves incident to the cloak will appear to be undisturbed, at the operational frequency of 3061 Hz. The initial optimization procedure for determining the positions of the small cylinders assumes isentropic conditions neglecting dissipative effects, meaning that the actual realization of the cloak might behave differently than intended. Through numerical simulations the acoustic cloak performance is compared with and without dissipation, giving an estimate of the differences that can be expected in similar cases. The results show that losses have very little impact on the key performance characteristic, the averaged visibility.

AB - Recent research has shown that the performance of acoustic metamaterials can be greatly influenced by the effects of viscous and thermal dissipation. In the worst case, an isentropic assumption can lead to an undesired performance. To further investigate the impact of losses on novel acoustic devices, an already known acoustic cloak is validated numerically, including the viscous and thermal dissipation effects. The specific cloaking device is realized using 120 small aluminium cylinders distributed around a larger cylindrical object, in such a way, that plane waves incident to the cloak will appear to be undisturbed, at the operational frequency of 3061 Hz. The initial optimization procedure for determining the positions of the small cylinders assumes isentropic conditions neglecting dissipative effects, meaning that the actual realization of the cloak might behave differently than intended. Through numerical simulations the acoustic cloak performance is compared with and without dissipation, giving an estimate of the differences that can be expected in similar cases. The results show that losses have very little impact on the key performance characteristic, the averaged visibility.

M3 - Article in proceedings

BT - Proceedings of NOise and Vibration Emerging Methods

ER -