Whiffle LES model

Below are the release notes for the Whiffle LES model. Curious about how the Whiffle LES model works? Learn more here.

v15

• Wind speed standard deviation, turbulence intensity and turbulence kinetic energy diagnostics now include their respective subgrid contributions.

• Implementation of new planetary boundary layer (PBL) scheme for meso-scale simulations, improving the parameterization of boundary layer turbulence. This primarily improves the representation of the boundary layer during daytime in the meso-scale model, and by extension in the LES.

• The surface characteristics (roughness length, etc.) within a meso-scale or LES grid box are now weighed by their respective fractional coverage within the grid box instead of taking the most common value.

v14

• Resolved issue with retrieving terrain data in Alaska.

• Fixed sign convention in veer variable of turbine output.

• Fixed issue with initialisation of soil moisture/temperature that led to issues with the development of the day-time boundary layers, in some cases with strong spatial soil moisture gradients with values around the wilting point.

v13

• Upgrade default subgrid configuration based on extensive verification and validation to reduce numerical artifacts and improve TI representation.

• Full implementation of AspTurbines library on GPU, leading to significant speed-up of runs with many turbines.

• Reduced wind turbine actuator disk filter width for more realistic wind turbine and wind farm representation.