Turbulent flow structures and aeolian sediment transport over a barchan sand dune

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Global Change: Geomorphology And Weathering (0790, 1824, 1825, 1826, 1886), Atmospheric Processes: Boundary Layer Processes, Atmospheric Processes: Land/Atmosphere Interactions (1218, 1631, 1843, 4301), Atmospheric Processes: Turbulence (4490)

Scientific paper

The turbulent structure of airflow over a barchan sand dune is determined using quadrant analysis of wind velocity data derived from sonic anemometers. Results indicate an increased frequency of ejection and sweep events in the toe region of the dune, characteristic of the turbulent bursting process. In contrast, at the crest there was a significant increase in the occurrence of outward interactions. Combined with high frequency saltation data our analyses show that turbulent structures characterised by a positive streamwise fluctuating velocity (+u′ sweeps at the toe and outward interactions at the crest) have a dominant influence on sand transport on the dune, together accounting for up to 83% and 95% of transporting events at the toe and crest respectively.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Turbulent flow structures and aeolian sediment transport over a barchan sand dune does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Turbulent flow structures and aeolian sediment transport over a barchan sand dune, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Turbulent flow structures and aeolian sediment transport over a barchan sand dune will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1559192

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.