publication . Thesis . 1992

Airflow over Barchan dunes: field measurements, mathematical modelling and wind tunnel testing

Wiggs, Giles F. S.;
Open Access English
  • Published: 01 Jan 1992
  • Publisher: University of London
  • Country: United Kingdom
There are few empirical measurements of velocity, shear velocity, sand transport, morphological change on the windward slopes of dunes.This thesis compares field measurements on a barchan dune in Oman with calculations using a mathematical model (FLOWSTAR) and measurements in a wind tunnel. All three techniques demonstrate similar patterns of velocity, confirming the acceleration of flow up the windward slope, deceleration between the crest and brink and significant flow deceleration upwind of and at the toe of the dune. The FLOWSTAR model is unable accurately to predict airflow at the brink and its predictions near the surface are highly susceptible to small-sc...
arXiv: Condensed Matter::Soft Condensed MatterPhysics::Fluid DynamicsPhysics::Geophysics
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Thesis . 1992
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