Eur. Phys. J. Appl. Phys.
Volume 62, Number 3, June 2013
|Number of page(s)||11|
|Section||Physics and Mechanics of Fluids, Microfluidics|
|Published online||13 June 2013|
A new dielectric effect in viscous liquids
Università Statale di Bergamo, Facoltà di Ingegneria, viale Marconi 5, 24044
Dalmine (BG), Italy
2 Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Complesso Universitario di Monte S. Angelo, via Cinthia, 80126 Naples, Italy
3 Istituto Nazionale di Fisica Nucleare, Sezione di Milano, via Celoria 16, 20133 Milan, Italy
Accepted: 15 May 2013
Published online: 13 June 2013
An accurate experimental and theoretical study has been performed about a phenomenon, not previously reported in the literature, occurring in highly viscous liquids: the formation of a definite pipe structure induced by the passage of a heavy body, this structure lasting for quite a long time. A very rich phenomenology (including mechanical, optical and structural effects) associated with the formation of the pipe has been observed in different liquids. Actually, the peculiar dynamical evolution of that structure does not appear as a trivial manifestation of standard relaxation or spurious effects. In particular, we have revealed different time scales during the evolution of the pipe and a non-monotonous decrease of the persistence time with decreasing viscosity (with the appearance of at least two different maxima). We put forward a microscopic model, consistent with the experimental data, where the pipe behaves as a “dielectric shell” whose time evolution is described through a simple thermodynamical approach, predicting several properties effectively observed.
© EDP Sciences, 2013
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.