Pattern formation - Instabilities in sand ripples

J. L. Hansen; M. v. Hecke; A. Haaning; C. Ellegaard; Ken Haste Andersen; T. Bohr; Thomas Sams

doi:10.1038/35066631

Pattern formation - Instabilities in sand ripples

J. L. Hansen, M. v. Hecke, A. Haaning, C. Ellegaard, Ken Haste Andersen, T. Bohr, Thomas Sams

Technical University of Denmark

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Sand ripples are seen below shallow wavy water and are formed whenever water oscillates over a bed of sand. Here we analyse the instabilities that can upset this perfect patterning when the ripples are subjected to large changes in driving amplitude or frequency, causing them to deform both parallel and transverse to their crests. Our results reveal new pattern-forming instabilities in granular matter exposed to fluid flow with strong vorticity.

Original language	English
Journal	Nature
Volume	410
Issue number	6826
Pages (from-to)	324-324
ISSN	0028-0836
DOIs	https://doi.org/10.1038/35066631
Publication status	Published - 2001

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title = "Pattern formation - Instabilities in sand ripples",

abstract = "Sand ripples are seen below shallow wavy water and are formed whenever water oscillates over a bed of sand. Here we analyse the instabilities that can upset this perfect patterning when the ripples are subjected to large changes in driving amplitude or frequency, causing them to deform both parallel and transverse to their crests. Our results reveal new pattern-forming instabilities in granular matter exposed to fluid flow with strong vorticity.",

author = "Hansen, {J. L.} and {v. Hecke}, M. and A. Haaning and C. Ellegaard and Andersen, {Ken Haste} and T. Bohr and Thomas Sams",

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T1 - Pattern formation - Instabilities in sand ripples

AU - Hansen, J. L.

AU - v. Hecke, M.

AU - Haaning, A.

AU - Ellegaard, C.

AU - Andersen, Ken Haste

AU - Bohr, T.

AU - Sams, Thomas

PY - 2001

Y1 - 2001

N2 - Sand ripples are seen below shallow wavy water and are formed whenever water oscillates over a bed of sand. Here we analyse the instabilities that can upset this perfect patterning when the ripples are subjected to large changes in driving amplitude or frequency, causing them to deform both parallel and transverse to their crests. Our results reveal new pattern-forming instabilities in granular matter exposed to fluid flow with strong vorticity.

AB - Sand ripples are seen below shallow wavy water and are formed whenever water oscillates over a bed of sand. Here we analyse the instabilities that can upset this perfect patterning when the ripples are subjected to large changes in driving amplitude or frequency, causing them to deform both parallel and transverse to their crests. Our results reveal new pattern-forming instabilities in granular matter exposed to fluid flow with strong vorticity.

U2 - 10.1038/35066631

DO - 10.1038/35066631

M3 - Journal article

C2 - 11268196

SN - 0028-0836

VL - 410

SP - 324

EP - 324

JO - Nature

JF - Nature

IS - 6826

ER -

Pattern formation - Instabilities in sand ripples

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