Regensburg 2013 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 4: Focus Session: Atmospheric and Climate Complexity
DY 4.2: Invited Talk
Monday, March 11, 2013, 15:30–16:00, H47
Statistical decomposition of atmospheric turbulence — •Matthias Wächter, Allan Morales, Tanja Mücke, Nico Reinke, and Joachim Peinke — ForWind - Institut für Physik, Universität Oldenburg
Atmospheric turbulence shows pronounced intermittency in the probability density functions of wind velocity increments ur=u(t+τ)−u(t), in the sense of very high probabilities of extreme events, over a wide range of scales τ. This intermittency is commonly observed to be significantly stronger and covering a wider range of scales than that found in homogeneous isotropic turbulence (HIT) in laboratory experiments.
We present a superposition approach which allows for a decomposition of atmospheric turbulence into subsets obeying statistics similar to HIT in the sense of Kolmogorov’s theory of 1962. The practical relevance of atmospheric intermittency is demonstrated for the example of wind energy converters. Furthermore, we give an outlook to the application of our approach in wind tunnel experiments with the aim of generating wind tunnel flows similar to atmospheric turbulence.