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Waving Wheat Neutral

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The benchmark is open to participants of the Wakebench project using canopy models. This is the first element of the building-block approach in this range, so it should be mandatory if you intend to participate with this model in other test cases down the line.


Demonstrate the performance of the model at reproducing the mean flow and turbulent quantities of a horizontally-homogeneous canopy profile.

Data Accessibility

The benchmark is offered to participants of the IEA Task 31 Wakebench who agree with the terms and conditions described below.

Input data

The conditions for simulating the waving wheat canopy profile in neutral conditions are:

  • Free-stream wind speed: U0 = 10.2 m/s
  • Canopy height: hc = 0.047 m
  • Canopy drag coefficient: Cd = 0.68
  • Canopy-area-density: A = 0.1 m-1
  • Obukhov length: L0 = ∞
  • Use dry air with a density ρ = 1.225 kg/m3 and dynamic viscosity μ = 1.73e-5 kg/ms

Validation data

The validation consists on mean and standard deviation values for the horizontal wind speed (U) and mean values of the shear stress (uw).

Model runs

The user is free to define the computational domain and model settings that best fit with the validation data.

Output data

Please provide vertical profiles of horizontal velocity (U), shear stress (uw) and turbulent kinetic energy (tke), using the file naming and format convention described in the Windbench user's guide with profID = prof1. Hence, the file contains the following variables (header), in this order: Z(m), U(m/s), uw(m2/s2) , tke(u2/s2).


The user should explain how the model is calibrated to fit the observed profiles and how tuned constants differ with respect to their default values.

Terms andConditions

Reffer to the WavingWheat Test Case guide for the terms and conditions for using the validation datasets.