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

V  Nikora; J  Heald; D  Goring; I  McEwan

doi:10.1088/0305-4470/34/50/103

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

V Nikora, J Heald, D Goring, I McEwan

Engineering

Research output: Contribution to journal › Letter › peer-review

39 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 language	English
Pages (from-to)	L743-L749
Number of pages	7
Journal	Journal of Physics A: Mathematical and General
Volume	34
Issue number	50
DOIs	https://doi.org/10.1088/0305-4470/34/50/103
Publication status	Published - 7 Dec 2001

Keywords

sand ripples
anomalous diffusion
model
turbulence

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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.",

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AU - Nikora, V

AU - Heald, J

AU - Goring, D

AU - McEwan, I

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Y1 - 2001/12/7

N2 - 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.

AB - 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.

KW - sand ripples

KW - anomalous diffusion

KW - model

KW - turbulence

U2 - 10.1088/0305-4470/34/50/103

DO - 10.1088/0305-4470/34/50/103

M3 - Letter

SN - 0305-4470

VL - 34

SP - L743-L749

JO - Journal of Physics A: Mathematical and General

JF - Journal of Physics A: Mathematical and General

IS - 50

ER -

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

Abstract

Keywords

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