Dynamics of secondary airflow and sediment transport over and in the lee of transverse dunes

Ian J. Walker, William G. Nickling

Research output: Contribution to journalArticle

164 Scopus citations

Abstract

Recent research literature on secondary airflow and sediment transport patterns over flow-transverse dunes is reviewed. Various issues surrounding the behaviour, modelling and sedimentological implications of near-surface airflow dynamics over dunes are discussed, including: the Law of the Wall; the Jackson and Hunt airflow model; the effects of streamline compression, acceleration and curvature on stoss slope shear stress; and, in particular, recent efforts to characterize secondary lee-side airflow patterns. A revised conceptual model of lee-side airflow is presented and areas for further research are identified regarding the implications of such patterns for dune sedimentary dynamics, morphology, and migration.

Original languageEnglish (US)
Pages (from-to)47-75
Number of pages29
JournalProgress in Physical Geography
Volume26
Issue number1
DOIs
StatePublished - Jan 1 2002
Externally publishedYes

Keywords

  • Aeolian processes
  • Boundary layer
  • Lee-side airflow
  • Sand dune dynamics
  • Secondary airflow
  • Sediment transport
  • Shear stress
  • Turbulence
  • Wind tunnel simulation
  • Wind velocity

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Earth and Planetary Sciences (miscellaneous)
  • Earth and Planetary Sciences(all)

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