Peer-Reviewed Journal Details
Mandatory Fields
O'Donncha, F,Hartnett, M,Plew, DR
2015
November
Journal Of Hydraulic Research
Parameterizing suspended canopy effects in a three-dimensional hydrodynamic model
Published
WOS: 10 ()
Optional Fields
Canopy flow hydrodynamics numerical modelling turbulence TURBULENCE CLOSURE MODELS OPEN-CHANNEL FLOW EMERGENT VEGETATION MUSSEL FARMS WATER-FLOW AQUACULTURE DIFFUSION DYNAMICS EQUATION SYSTEM
53
714
727
This paper presents an amendment of an existing three-dimensional hydro-environmental model (Environmental Fluid Dynamics Code) to incorporate effects of suspended canopies on the vertical flow structure. Five different modelling approaches are investigated, encompassing hydrodynamic form drag imparted by the suspended canopy, an amended two-equation turbulence scheme representing turbulence generated locally by elements within the canopy, and three separate formulations for vertical profiles of drag coefficients. Data from laboratory experiments with rigid cylinders are used to validate the calculations of velocity and shear stresses. The results show that the most accurate reproduction of the canopy flow was obtained using a vertically varying drag coefficient along with a two-equation turbulence closure scheme that includes additional turbulence production and dissipation terms. The numerical model reproduced velocity profiles accurately, but the shear stresses are slightly overestimated.
10.1080/00221686.2015.1093036
Grant Details
Publication Themes