Abstract
The turbulent flow around a vertical porous fence was simulated by using a weakly-compressible-flow computational method. A large-eddy-simulation technique together with a subgrid-scale turbulence model is applied to account for the turbulence effects in the flow. By varying the approaching flow condition and the porosity of the fence, the wake characteristics behind the fence are investigated. Results show that as the fence porosity increases, for the mean flow condition the vortex tends to be elongated and results in a reduction of the drag on the fence. In addition, the drag force decreases with an increase of the boundary layer thickness of the approaching flow.
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