Abstract
As we have seen in the previous chapters, due the nonlinear behavior it is very difficult—if not impossible—to get simple analytical solutions of the basic fluid dynamic equations in a systematic way. Therefore, it has become normal to use (massive) numerical methods for solving them. In an ideal situation this would mean that only the Eqs. (3.37) from Chap. 3 are used (of course adapted to a suitable form for computers) together with a geometrical description of the problem (a wind turbine wing, for example) and a surrounding control volume for setting the boundary conditions for the unknown fields (pressure and velocity).
You can’t calculate what you haven’t understood. (Originally thought to be from P. W. Anderson.)
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Notes
- 1.
Quadratic correlations may be replaced by diffusions term because of the Fluctuation–Dissipation Theorem from linear and equilibrium statistical mechanics ([54] in Chap. 3). It states that the variance of equilibrium fluctuations determines the strength of losses by small disturbances as well.
- 2.
From now on in this book the term CFD is assumed to be a RANS simulation where only the full 3D geometry of the wind turbine (or its blades) is used.
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Schaffarczyk, A.P. (2020). Application of Computational Fluid Mechanics. In: Introduction to Wind Turbine Aerodynamics. Green Energy and Technology. Springer, Cham. https://doi.org/10.1007/978-3-030-41028-5_7
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