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This article in AJ

  1. Vol. 82 No. 5, p. 1027-1030
     
    Received: June 22, 1989
    Published: Sept, 1990


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doi:10.2134/agronj1990.00021962008200050038x

Wind Profile Parameter Estimation Using Mathcad

  1. Terry A. Howell 
  1. USDA-ARS, Conserv. & Prod. Res. Lab, P.O. Drawer 10, Bushland,TX 79012

Abstract

Abstract

Wind profile parameters are required to estimate aerodynamic boundary layer resistances for heat, water vapor, and momentum transfer. Traditional methods used to compute these parameters take time to program, are slow to reach solutions, and often fail to achieve solution convergence. This study evaluated the applicability of a commercial mathematics software package, MathCAD, to estimate the three parameters—friction velocity (U*), zero-plane displacement height (4,an d the roughness length, Zo—of the adiabatic log-law wind profile. The solutions were evaluated and compared to previous published solutions for several wind profiles using traditional methods. MathCAD was found to solve the wind profiles rapidly without convergence difficulty on the tested profiles. In all the comparisons, MathCAD produced almost exact duplications of previously published results. The ease, speed, and accuracy of the solution method employed in MathCAD appear to be superior to the more traditional methods.

Contribution from USDA-ARS, Southern Plains Area.

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