Skip to main content
Journal cover image

A joint velocity-intermittency analysis reveals similarity in the vertical structure of atmospheric and hydrospheric canopy turbulence

Publication ,  Journal Article
Keylock, CJ; Ghisalberti, M; Katul, GG; Nepf, HM
Published in: Environmental Fluid Mechanics
February 1, 2020

Turbulent flow through and over vegetation continues to draw significant research attention given its relevance to a plethora of applications in earth and environmental science. Canopy flows are characterized by three-dimensional coherent vortical motions not directly accessible from single-point measurements, which pose a challenge to formalizing links between vegetation structure and turbulent motion. A joint velocity-intermittency technique is applied to velocity data collected within and above aquatic vegetation in a hydraulic flume and above a forested canopy. The approach reveals behavior that provides greater insight into canopy flow dynamics than may be inferred from the vertical profiles of mean velocity, turbulence intensity and Reynolds stresses, which are the quantities usually studied. There is a remarkable similarity in the structure of such flows between the forest canopy and the flume study despite large differences in morphology and stem rigidity. In particular, these results determine an outer flow type arising above 1.5 canopy heights, while turbulent in-rushing events are most significant at the zero-plane displacement. The approach also implies ways in which improved models for canopy turbulence may be developed.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Environmental Fluid Mechanics

DOI

EISSN

1573-1510

ISSN

1567-7419

Publication Date

February 1, 2020

Volume

20

Issue

1

Start / End Page

77 / 101

Related Subject Headings

  • Meteorology & Atmospheric Sciences
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Keylock, C. J., Ghisalberti, M., Katul, G. G., & Nepf, H. M. (2020). A joint velocity-intermittency analysis reveals similarity in the vertical structure of atmospheric and hydrospheric canopy turbulence. Environmental Fluid Mechanics, 20(1), 77–101. https://doi.org/10.1007/s10652-019-09694-w
Keylock, C. J., M. Ghisalberti, G. G. Katul, and H. M. Nepf. “A joint velocity-intermittency analysis reveals similarity in the vertical structure of atmospheric and hydrospheric canopy turbulence.” Environmental Fluid Mechanics 20, no. 1 (February 1, 2020): 77–101. https://doi.org/10.1007/s10652-019-09694-w.
Keylock CJ, Ghisalberti M, Katul GG, Nepf HM. A joint velocity-intermittency analysis reveals similarity in the vertical structure of atmospheric and hydrospheric canopy turbulence. Environmental Fluid Mechanics. 2020 Feb 1;20(1):77–101.
Keylock, C. J., et al. “A joint velocity-intermittency analysis reveals similarity in the vertical structure of atmospheric and hydrospheric canopy turbulence.” Environmental Fluid Mechanics, vol. 20, no. 1, Feb. 2020, pp. 77–101. Scopus, doi:10.1007/s10652-019-09694-w.
Keylock CJ, Ghisalberti M, Katul GG, Nepf HM. A joint velocity-intermittency analysis reveals similarity in the vertical structure of atmospheric and hydrospheric canopy turbulence. Environmental Fluid Mechanics. 2020 Feb 1;20(1):77–101.
Journal cover image

Published In

Environmental Fluid Mechanics

DOI

EISSN

1573-1510

ISSN

1567-7419

Publication Date

February 1, 2020

Volume

20

Issue

1

Start / End Page

77 / 101

Related Subject Headings

  • Meteorology & Atmospheric Sciences
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences