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Estimation of the surface stress from the streamwise pressure gradient: The Kármán Integral Momentum Equation revisited
Journal article   Peer reviewed

Estimation of the surface stress from the streamwise pressure gradient: The Kármán Integral Momentum Equation revisited

P.A. Findlater, W.D. Scott, S.E. Greenhill and J.M. Hopwood
Environmental Fluid Mechanics, Vol.4(4), pp.367-383
2005
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Abstract

A method is developed to estimate the stress at the surface in a portable wind tunnel for wind erosion studies. The boundary layer height and the pressure gradient are used in a simple expression from the Kármán Integral Momentum Equation. Values of friction velocity u* are within 10% of experimental values obtained through correlation techniques, including measurements of differential pressures with the Murdoch Turbulence Probe MTP and the X-wire, hot-wire anemometer XWA. Wind velocity and stress profiles reveal logarithmic trends and a 'constant stress layer' near the surface in the DAWA portable wind tunnel. Realignment of the statistics with the mean wind is essential.

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Collaboration types
Domestic collaboration
Citation topics
8 Earth Sciences
8.205 Ocean Dynamics
8.205.2041 Wind Erosion
Web Of Science research areas
Environmental Sciences
Mechanics
Meteorology & Atmospheric Sciences
Oceanography
Water Resources
ESI research areas
Geosciences
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