Aeolian and subaqueous bedforms in shear flows | Zendy

Bruno Andreotti | Zendy; Philippe Claudin | Zendy

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Aeolian and subaqueous bedforms in shear flows

Author(s) -

Bruno Andreotti,

Philippe Claudin

Publication year - 2013

Publication title -

philosophical transactions of the royal society a mathematical physical and engineering sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.074

H-Index - 169

eISSN - 1471-2962

pISSN - 1364-503X

DOI - 10.1098/rsta.2012.0364

Subject(s) - bedform , aeolian processes , geology , instability , geomorphology , sediment , flow (mathematics) , boundary layer , sediment transport , geotechnical engineering , mechanics , physics

A sediment bed sheared by an unbounded flow is unconditionally unstable towards the growth of bedforms called ripples under water and dunes in the aeolian case. We review here the dynamical mechanisms controlling this linear instability, putting the emphasis on testing models against field and laboratory measurements. We then discuss the role of nonlinearities and the influence of finite size effects, namely the depth of the atmospheric boundary layer in the aeolian case and the water depth in the case of rivers.

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