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Influence of bubble size and thermal dissipation on compressive wave attenuation in liquid foams

Abstract : Acoustic or blast wave absorption by liquid foams is especially efficient and bubble size or liquid fraction optimization is an important challenge in this context. A resonant behavior of foams has recently been observed, but the main local dissipative process is still unknown. In this paper, we evidence the thermal origin of the dissipation, with an optimal bubble size close to the thermal boundary layer thickness. Using a shock tube, we produce typical pressure variation at time scales of the order of the millisecond, which propagates in the foam in linear and slightly non-linear regimes.
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https://hal.archives-ouvertes.fr/hal-01230039
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Submitted on : Tuesday, November 17, 2015 - 4:04:06 PM
Last modification on : Tuesday, March 3, 2020 - 11:08:14 AM
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Martin Monloubou, Arnaud Saint-Jalmes, Benjamin Dollet, Isabelle Cantat. Influence of bubble size and thermal dissipation on compressive wave attenuation in liquid foams. EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2015, 112 (3), pp.34001. ⟨10.1209/0295-5075/112/34001⟩. ⟨hal-01230039⟩

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