Spontaneous spirals in vibrated granular chains

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We present experimental measurements on the spontaneous formation of compact spiral structures in vertically-vibrated granular chains. Under weak vibration when the chain is quasi two-dimensional and self-avoiding, spiral structures emerge from random initial configurations. We compare the spiral geometry with that of an ideal tight spiral. Globally, the spiral undergoes a slow rotation such that to keep itself wound, while internally, fast vibrational modes are excited along the backbone with transverse oscillations dominating over longitudinal ones.

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5 p.

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Ecke, R. E. (Robert E.); Daya, Z. A. (Zahir A.); Rivera, M. K. (Michael K.) & Ben-Naim, E. (Eli) January 1, 2002.

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Description

We present experimental measurements on the spontaneous formation of compact spiral structures in vertically-vibrated granular chains. Under weak vibration when the chain is quasi two-dimensional and self-avoiding, spiral structures emerge from random initial configurations. We compare the spiral geometry with that of an ideal tight spiral. Globally, the spiral undergoes a slow rotation such that to keep itself wound, while internally, fast vibrational modes are excited along the backbone with transverse oscillations dominating over longitudinal ones.

Physical Description

5 p.

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  • Submitted to: Proceedings of the Materials Research Society; Granular Material-Based Technologies Symposium, 2-3 Dec. 2002, Boston, MA

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  • Report No.: LA-UR-02-7473
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976473
  • Archival Resource Key: ark:/67531/metadc927144

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  • January 1, 2002

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 1:30 p.m.

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Ecke, R. E. (Robert E.); Daya, Z. A. (Zahir A.); Rivera, M. K. (Michael K.) & Ben-Naim, E. (Eli). Spontaneous spirals in vibrated granular chains, article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc927144/: accessed September 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.