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

Findlater, P.A., Scott, W.D., Greenhill, S.E. and Hopwood, J.M. (2005) Estimation of the surface stress from the streamwise pressure gradient: The Kármán Integral Momentum Equation revisited. Environmental Fluid Mechanics, 4 (4). pp. 367-383.

Link to Published Version: http://dx.doi.org/10.1007/s10652-005-6203-4
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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.

Publication Type: Journal Article
Publisher: Springer Netherlands
Copyright: © 2004 Kluwer Academic Publishers
URI: http://researchrepository.murdoch.edu.au/id/eprint/16062
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