Saarblitz, Wind farm in HDR,, creative commons by-nc-sa 2.0


The Wyoming Wind and Aerospace Applications Komputation Environment (W2 A2 KE3D) framework provides high-fidelity modeling of wind turbines. The intent is to solve the Navier-Stokes equations and capture accurate flow physics at the microscale level on the blade.

W2 A2 KE3D is a near-body/off-body mesh system utilizing an unstructured mesh for the near-body mesh and a structured mesh for the off-body mesh. Tioga is used as a method of providing an overset method between the near-body and off-body meshes. 

With this framework multiple near-body and off-body solvers can be inserted and run using one central driver code.

Two near-body unstructured solvers are configured:

      1. NSU3D - a well established vertex-centered finite-volume solver for mixed element un- structured meshes. NSU3D solves the Unsteady Reynolds Averaged Navier-Stokes (URANS) equations through a multi- grid technique. 

      2. DG3D -  is a high-order, mixed- and curved element unstructured mesh solver capable of spatial order-of-accuracy ranging from first to eighth order. It is developed on the discontinuous Galerkin (DG) finite element method (FEM) for the compressible Navier- Stokes equations. The temporal derivative is handled through an explicit Runge-Kutta method or an implicit BDF2 scheme. 

Two off-body structured solvers are configured:

     1. CartDG - a high-order block Cartesian discontinuous Galerkin finite element method based compressible Navier- Stokes solver (Ref. 29). CartDG is a nodal, collocated, tensor- product basis formulation. It is developed to handle an arbi- trary spatial order-of-accuracy and has explicit time-stepping of second and fourth orders via the Runge-Kutta method. 

     2. SAMCartDG - is the adaptive mesh refinement (AMR) extension of the CartDG solver. SAMCartDG is implemented into the Structured Adaptive Mesh Refinement Applications Interface (SAMRAI) developed at Lawrence Livermore National Laboratory. SAMRAI is a patch based adaptive mesh refinement (AMR) system of properly nested refinement levels containing logically rectangular grid blocks. Grid generation and structure, parallel communication, and load balancing of SAMCartDG are handled by the SAMRAI infrastructure. 


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Brazell's picture
Submitted by Brazell on April 6, 2016 - 11:59am
NSU3D near-body, CARTDG off-body
Turbulence closure
Turbulence model

near-body NSU3D: RANS

off-body CARTDG: No model (ILES)

Atmospheric boundary layer
Atmospheric Stability
Atmospheric Stability
Stability model
Forest canopy
Wind farm
Wind turbine
Rotor model
Wake model
Wind farm range

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