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- W2120851165 abstract "It has been shown that common two-equation RANS turbulence closures are not well adapted to actuator disk modeling of the wind turbine rotor [9]. This combination of models is nonetheless incredibly popular for wind farm analyses given its relatively low computational cost and reasonably accurate velocity predictions for isolated rotors (see e.g. [1, 11, 7]). However, a fundamental change is likely needed to make significant improvements in velocity and turbulence predictions within a real wind farm. As the actuator disk representation of the rotor is by far the most economical in terms of computing time (in comparison to actuator surface or line approaches) and is probably a mainstay, it is more appropriate to reconsider the closure. Of course, the greatest weakness of many lower-order turbulencemodels is the reliance on the eddy viscosity approximationwhich ties stresses to strain rates in the flow and imposes a single turbulent length scale. On the other hand, Reynolds stress transport models avoid these problems entirely by modeling each component of the stress tensor with its own transport equation and might be a promising alternative." @default.
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- W2120851165 date "2014-01-01" @default.
- W2120851165 modified "2023-09-30" @default.
- W2120851165 title "A Closer Look at Second-Moment Closure for Wind Farm Analysis" @default.
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- W2120851165 doi "https://doi.org/10.1007/978-3-642-54696-9_14" @default.
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