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CFDWind 1.0

Submitted by Roberto A. Chav... on May 16, 2015 - 12:00am
Main hypothesis

Steady-state, surface layer, isotropic eddy-viscosity turbulence, boussinesq approximation for air density.

In this first version of CFDWind1, the near wall inconsistency was solved by using the Blocken et al. 2007 approach which was inherited from the previous implementation in the commercial solver Fluent, which does not allow to access the source code in order to modify the wall functions.   Further versions (CFDWind1.1 and CFDWind2) have updated this condition to the more consistent formulation of Richards & Hoxey.

OpenFoam v1.7
Turbulence closure
Turbulence model

k-eps consistent with Monin-Obukhov similarity theory (Blocken et al. 2007; Richards and Hoxey, 1993).

Atmospheric boundary layer
Atmospheric Stability
Atmospheric Stability
Stability model
Buoyancy source term in tke and tdr equations (Sogachev, 2009).
Forest canopy
Canopy model
Source terms in momentum, tke and tdr equations (Sanz, 2003).
Wind farm
Wind turbine

Blocken B, Stathopoulos T, Carmeliet J. 2007, CFD simulation of the atmospheric boundary layer:
wall function problems. Atmospheric Environment 41:238–252

Cabezón D., Sanz Rodrigo J., Martí I., Crespo A., 2009, CFD modelling of the interaction between the Surface Boundary Layer and rotor wake, EWEC-09 proceedings, Marseille (France), March 2009

Richards P.J., Hoxey R., 1993, Appropriate boundary conditions for computational wind engineering models using the k–ε turbulence model, J. Wind Eng. Ind. Aerodyn. 46-47: 145–153

Sanz Rodrigo J., Cabezón D., Martí I., Patilla P., van Beeck J., 2008, Numerical CFD modelling of non-neutral atmospheric boundary layers for offshore wind resource assessment based on Monin-Obukhov theory, EWEC-08 scientific proceedings, Brussels (Belgium), April 2008.