Conference proceeding
On the effect of porosity on the wake structure of flow past a circular patch of vegetation
RIVER FLOW 2016, pp.2234-2239
2016
Abstract
Highly-resolved three-dimensional Large Eddy Simulation (LES) is used to understand the structure of the flow through and downstream of a circular patch of vegetation, at large distances from the channel bottom, where the effect of the bottom friction is negligible and flow can be considered uniform in the vertical direction. The patch contains an array of vertical rigid cylinders of constant diameter. This flow serves as a base case against which one can evaluate the effect of the presence of the no-slip boundary condition and finite channel flow depth in more realistic geometrical set ups. The paper discusses how the flow and turbulence structure within the patch and inside its wake vary with the Solid Volume Fraction (SVF). The effect of the SVF on the mean drag forces acting on the cylinders within the patch is also discussed. Two test cases are analyzed. They correspond to the regime when large-scale vortex shedding occurs in the wake of the porous patch (SVF = 0.1) and to the regime when no wake billows form in the wake of the porous patch (SVF = 0.023).
Details
- Title: Subtitle
- On the effect of porosity on the wake structure of flow past a circular patch of vegetation
- Creators
- K ChangG Constantinescu
- Contributors
- D Hanes (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- RIVER FLOW 2016, pp.2234-2239
- Language
- English
- Date published
- 2016
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9984231918702771
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