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Investigating Taylor's Hypothesis with Eddy Advection Speeds over Varying Homogeneity Conditions

Explore the validity of Taylor's hypothesis amidst shifting homogeneity conditions and the influence of surface waves on advection velocity. Analyze advection speeds in comparison to mean wind speeds and the impact on turbulent elements.

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Investigating Taylor's Hypothesis with Eddy Advection Speeds over Varying Homogeneity Conditions

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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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