Isolated Hill

Furry Hill Neutral

Javier Sanz Rodrigo's picture
Submitted by Javier Sanz Rodrigo on May 4, 2015 - 2:33pm

Scope

The benchmark is open to participants of the Wakebench project using canopy models. The benchmark will evaluate the ability of the models at reproducing the interaction of canopy and hill flows in idealized conditions.

Objectives

Demonstrate the performance of the models at reproducing mean flow and turbulent quantities on a hill-induced heterogeneous canopy. Test model fine-tuning strategies in a controlled environment when boundary conditions are well defined.

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 Furry Hill experiment in neutral conditions are:

  • Inlet profile: measurements at X = -2.125 m (X/L = -5.06)
  • Hill profile: Zh(X)=h/(1+(X/L)2), with X = 0 at the crest of the ridge, truncated at X = ±925 mm where it smoothly meets the flat floor. Ridge height h = 150 mm, half-length L = 420 mm.
  • 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

Bolund Neutral

Javier Sanz Rodrigo's picture
Submitted by Javier Sanz Rodrigo on May 4, 2015 - 2:30pm

Scope

The benchmark revisits the blind test of 2009 now allowing the participants to optimize their models to obtain the best match to the validation dataset.

Objectives

Test model fine-tuning strategies that will be applied in complex terrain sites. Evaluate turbulence models in a test site with well defined boundary conditions.

Data Accessibility

The benchmark is offered to participants of the IEA Task 31 Wakebench.

Input data

The conditions for simulating the Bolund flow field in neutral conditions are:

Askervein Neutral

Javier Sanz Rodrigo's picture
Submitted by Javier Sanz Rodrigo on April 30, 2015 - 4:28pm

Scope

The benchmark is open to participants of the Wakebench project using flow models over topography in neutral conditions. The study will show the changes in the mean flow field above the Askervein hill for different incident flow angles defined by the following wind directions:

  • 210º, perpendicular to the long axis of the hill (classical reference),
  • 130º, parallel to the long axis, and
  • 90º, in the wake of upstream hills.

Objectives

Test model fine-tuning strategies that will be applied in complex terrain sites. Evaluate turbulence models in a test site with reasonably well defined boundary conditions. Evaluate the ability of the models to predict wind direction variations close to the ground induced by local topography.

Data Accessibility

The benchmark is offered to participants of the IEA Task 31 Wakebench.

Input data

The conditions for simulating the Askervein flow field in neutral conditions are: