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.
*Subscription may be required
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|
|Copyright:||© 2004 Kluwer Academic Publishers|
|Item Control Page|