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1. An introduction to Terra-Incognita

A LARGE EDDY SIMULATION PERSPECTIVE OF TERRA-INCOGNITA. 1. An introduction to Terra-Incognita . 2. Rough wall SGS dynamics and Terra-Incognita. 3. Large-eddy simulation (LES). 4. A potpourri of LES with complex boundaries . is the characteristic length scale of

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1. An introduction to Terra-Incognita

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  1. A LARGE EDDY SIMULATION PERSPECTIVE OF TERRA-INCOGNITA 1. An introduction to Terra-Incognita 2. Rough wall SGS dynamics and Terra-Incognita 3. Large-eddy simulation (LES) 4. A potpourri of LES with complex boundaries

  2. is the characteristic length scale of the vertical velocity spectrum Kaimal & Finnigan (1994) Increasing stratification z/L

  3. convective stable

  4. LES limit Meso limit convective stable

  5. A LOOK AT FILTERING

  6. SIMPLE (CHEAP) FILTERING EXAMPLE …

  7. MOVING BETWEEN MESO LIMIT AND LES LIMIT Data in the atmospheric surface layer

  8. MOVING BETWEEN MESO LIMIT AND LES LIMIT

  9. MOVING BETWEEN MESO LIMIT AND LES LIMIT

  10. MOVING BETWEEN MESO LIMIT AND LES LIMIT

  11. MOVING BETWEEN MESO LIMIT AND LES LIMIT MESO limit

  12. Can we use targeted observations to provide insight as to the nature of SGS motions in high Re PBLs, and the Terra-Incognita regime?

  13. HATS CONFIGURATIONS Wide Narrow

  14. AN EXAMPLE OF LATERAL (Y) FILTERING U ``2D plane of turbulence”

  15. AN EXAMPLE OF LATERAL (Y) FILTERING U

  16. AN EXAMPLE OF LATERAL (Y) FILTERING U

  17. WHAT DO SGS STATISTICS FROM OBSERVATIONS LOOK LIKE?

  18. HATS ARRAYS Isotropic

  19. OHATS FIELD CAMPAIGN ASIT Laser altimeters 18 CSATS 275 hours ``12 days of data” analyzed

  20. HATS OHATS

  21. Meso Limit! What produces and ?

  22. WHAT ARE THE FLUX EQUATIONS?

  23. 0 SGS scalar flux

  24. Isotropic production Pressure destruction Anisotropic production

  25. 0 0 Rotta model 0 0 Eddy viscosity model Time scale

  26. Eddy viscosity model

  27. Anisotropic model C=0.3 (Hatlee & Wyngaard, 2006)

  28. SGS MOMENTUM FLUXES

  29. Considerable Algebra !

  30. Isotropic production Pressure destruction Anisotropic deviatoric production

  31. 0 0 Rotta model 0 0 Time scale

  32. HATS OHATS LES Limit MESO Limit Measure of scale separation

  33. HATS OHATS LES Limit MESO Limit Measure of scale separation

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