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roughness length
noun
A parameter of some vertical wind profile equations that model the horizontal mean wind speed near the ground; in the log wind profile, it is equivalent to the height at which the wind speed theoretically becomes zero.
Exact(60)
Digital elevation model (DEM) and surface roughness length were the key inputs for the CFD simulation.
Various approaches were discussed for the determination of the roughness length (z0) for a given surface.
Moreover, the roughness length scale reaches a maximum value and then decreases with increasing wind speed.
Noah LSM is effective in updating surface roughness length according to snow depth.
The power exponential function could relate well the wind profiles in the eyewall to the roughness length.
The significant uncertainties associated with roughness length estimates obtained using indirect velocity-profile-fitting techniques in ABL simulations are documented.
In this case, the finite element discretization consists on a triangular mesh adapted to the terrain topography and roughness length.
Aerodynamic roughness length scale (z0) is an essential parameter for the parameterization of momentum flux exchanges at land-atmosphere interface.
In this comparison, the influences of roughness length and mean wind speed on the turbulent wind characteristics were also examined.
This paper investigates the combined effect of inflow method and aerodynamic roughness length for LES of the neutral ABL.
The value of α (wind shear coefficient) was used to determine the wind speeds at higher height instead of the roughness length, zo.
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