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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Phys. | doi: 10.3389/fphy.2019.00187

Dynamics of the fluctuating flying chain

Eirik G. Flekkøy1,  Marcel Moura1* and  Knut Jørgen Måløy1
  • 1University of Oslo, Norway

A chain which is made to flow from a container, forms a striking arch that rises well above the
container top. This phenomenon is caused by the well known Mould effect and is explained by a
supply of momentum from the container, causing an upwards kick. Here we introduce a theory
that allows for dynamic fluctuations of the chain and compare with corresponding simulations and
experiments. The predictions for the chain velocity and fountain height agree well with experiments.
We also explore the underlying mechanism for this momentum transfer for different chain models
and find that it depends subtly on the nature of the chain as well as on the container.

Keywords: Flying chain, Continuum Mechanics, ropes and cables, strings, outreach

Received: 20 May 2019; Accepted: 29 Oct 2019.

Copyright: © 2019 Flekkøy, Moura and Måløy. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Marcel Moura, University of Oslo, Oslo, 0316, Oslo, Norway, marcelmoura@yahoo.com.br