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Taylor´s hypothesis

Taylor´s hypothesis. Erik Nilsson 120420. References :. Lumley and Panofsky 1964. Mizuno and Panofsky 1975. Horst and Lenschow 2009. 3 pages. 6 pages. 4 pages. U. Tower. A. beta. Distance X ab. X ab *cos (beta) is the streamwise separation distance. B. Tower.

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Taylor´s hypothesis

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  1. Taylor´shypothesis Erik Nilsson 120420

  2. References: Lumley and Panofsky 1964 Mizuno and Panofsky 1975 Horst and Lenschow 2009 3 pages 6 pages 4 pages

  3. U Tower A beta DistanceXab Xab*cos(beta) is the streamwise separation distance B Tower Ua is the eddyadvection speed whichadvects the turbulent elements. It is equal to the meanwind speed U when Taylors hypthesis is true (Horst and Lenschow 2009)

  4. Somepreviousresults: Ua is the eddyadvection speed whichadvects the turbulent elements. It is equal to the meanwind speed U when Taylors hypthesis is true • Advection speeds somewhatlargerthanmeanwind speed (in the mean, largescatter) • Largeeddies faster than small eddies (compareunstable and stableconditions) Hypothesis: • TH morelikelytrue over sea with smallerhomogeneity problem? • Influence from surfacewaves: Higheradvectionvelocityduringlargescalewave events (swell)?

  5. Lumley and Panofsky 1964

  6. Lumley and Panofsky 1964

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