Diffusion of saltating particles in unidirectional water flow over a rough granular bed

V Nikora, J Heald, D Goring, I McEwan

Research output: Contribution to journalLetter

32 Citations (Scopus)

Abstract

We show that the motion of saltating particles on a flat rough bed in unidirectional water flow is diffusive and comprises three ranges (local, intermediate, and global) of spatial and temporal scales with different scaling behaviour and diffusion properties. Our computer simulations suggest that the ratio of the travelling particle diameter to the prevailing diameter of static bed particles (or the height of bed roughness) is one of the key parameters controlling particle diffusion.

Original languageEnglish
Pages (from-to)L743-L749
Number of pages7
JournalJournal of Physics A: Mathematical and General
Volume34
Issue number50
DOIs
Publication statusPublished - 7 Dec 2001

Keywords

  • sand ripples
  • anomalous diffusion
  • model
  • turbulence

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