Homogeneous Forest

Alaiz Sensitivity

Javier Sanz Rodrigo's picture
Submitted by Javier Sanz Rodrigo on May 7, 2015 - 10:22am

Scope

The benchmark is open to participants of the Wakebench project using flow models over topography in neutral conditions. This initial benchmark will carry out an assessment of the sensitivity to modeling criteria that is adopted when approaching the simulation of a realistic site for wind farms in complex terrain. In order to simplify the analysis, only the North and South wind direction sectors will be analyzed.

Objectives

Carry out sensitivity tests on different elements of the modeling chain that require user-dependent decisions: domain dimensions, mesh type and resolution, roughness definition, and wind direction binning (1).

Data Accessibility

The benchmark is offered to participants of the IEA Task 31 Wakebench who has signed the NDA attached to the test case guide.

Input data

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

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

Alaiz Neutral

Javier Sanz Rodrigo's picture
Submitted by Javier Sanz Rodrigo on March 31, 2015 - 9:14am

Scope

The benchmark is open to participants of the Wakebench project using flow models over topography in neutral conditions. This benchmark is a follow up of the sensitivity analysis (Alaiz_Sensitivity) to validate the results in neutral conditions.

Objectives

Produce the best estimate of the flow field in neutral conditions above the Alaiz site for the North and South wind directions.

Data Accessibility

The benchmark is offered to participants of the IEA Task 31 Wakebench who has signed the NDA attached to the test case guide.

Input data

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