Volume 112, Number 3, November 2015
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||30 November 2015|
Propagation of a transverse wave on a foam microchannel
1 Laboratoire Matière et Systèmes Complexes (MSC) - Université Paris-Diderot, CNRS UMR 7057 - Paris, France
2 Sorbonne Universités, UPMC Université Paris 6, UFR 925 - Paris, France
Received: 1 August 2015
Accepted: 5 November 2015
In a dry foam, soap films meet by three in the liquid microchannels, called Plateau borders, which contain most of the liquid of the foam. We investigated here the transverse vibration of a single Plateau border isolated on a rigid frame. We measured and we computed numerically and analytically the propagation of a transverse pulse along the channel in the 20–2000 Hz frequency range. The dispersion relation shows different scaling regimes, which provide information on the role of inertial and elastic forces acting on the Plateau border. At low frequency, the dispersion relation is dominated by the vibration of the air set into motion by the transverse vibration of the adjacent soap films. The inertia of the liquid in the Plateau border plays a role at high frequency, the critical frequency separating the low-frequency and the high-frequency regimes being a decreasing function of the radius R of the Plateau border.
PACS: 47.57.Bc – Foams and emulsions / 68.03.Cd – Surface tension and related phenomena / 46.40.-f – Vibrations and mechanical waves
© EPLA, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.