We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Instability of canopy flows.
- Authors
Zampogna, Giuseppe A.; Bottaro, Alessandro; Pluvinage, Franck; Kourta, Azeddine
- Abstract
Honami and monami waves are caused by large-scale coherent vortex structures which form in shear layers generated by canopies. In order to reach new insights on the onset of such waves, the instability of these shear layers is studied. Two different approaches are used. In the first approach, the presence of the canopy is modeled via a drag coefficient, taken to vary along the canopy as by experimental indications. The second approach considers the canopy as a porous medium and different governing equations for the fluid flow are deduced. In this second case, the anisotropy of the canopy, composed by rigid cylindrical elements, is accounted for via an apparent permeability tensor. The results obtained with the latter approach approximate better experimental correlations for the synchronous oscillations of the canopy.
- Subjects
STABILITY theory; FLUX-line lattice; SHEAR flow; DRAG (Hydrodynamics); ANISOTROPY; HYDRAULIC conductivity
- Publication
Water Resources Research, 2016, Vol 52, Issue 7, p5421
- ISSN
0043-1397
- Publication type
Article
- DOI
10.1002/2016WR018915