Translocation of a granular chain in a horizontally vibrated saw-tooth channel
- 291 Downloads
We study the translocation mechanism of a granular chain in a horizontally vibrated saw-tooth channel using MD simulations and macro-scale experiments and show that the translocation speed is independent of the chain length as long as the chain length is larger than the spatial period of the saw-tooth. With the help of simulation, we explore the effect of geometry of the container and frequency and amplitude of vibration as well as chain flexibility on the chain drift speed. We observe that the most efficient transport is achieved when one of the channel walls is shifted with respect to the other wall by an amount equal to half the spatial period of the saw-tooth. We define a persistence length for the chain and show that the translocation speed depends on the ratio of persistence length over the spatial period of the saw-tooth. The optimum translocation occurs when this ratio is about 0.4. We also determine the optimum saw-tooth angle for the translocation of the chain as well as the optimum distance between the two walls. Some properties of this system are similar to those of polymer systems.
KeywordsFlowing Matter: Granular Matter
- 7.Joshua David Cross, Elizabeth A. Strychalski, H.G. Craighead, J. Appl. Phys. 102, 4701 (2007)Google Scholar
- 34.S.F. Edwardes, Granular Matter: An Interdisciplinary Approach, edited by A. Mehta (Springer, New York, 1994)Google Scholar
- 43.Masao Doi, Sam F. Edwards, The Theory of Polymer Dynamics, Vol. 73 (Oxford University Press, 1988)Google Scholar
- 46.Thorsten Pöschel, Thomas Schwager, Computational Granular Dynamics: Models and Algorithms (Springer Science & Business Media, 2005)Google Scholar
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.