A numerical study on flow around a triangular prism located behind a porous fence

The flow characteristics around a two-dimensional triangular-shaped prism l ocated behind a porous wind fence were investigated numerically. The shelte r effect of the porous wind fence on wind flow around the triangular prism model was studied by changing the porosity, height, and location of the win d fence. The numerical method developed for the present work is based on th e finite volume method with the Quick scheme. The RNG k-epsilon turbulence model and orthogonal grid were used and they are found to be stable in term s of numerical convergence for predicting the separated shear flow. The val idity of the numerical method developed in the present work has been evalua ted by comparing the numerical results with the experimental data. As a res ult, the numerical predictions show good agreements with the experimental r esults. The wind fence with a porosity of about 0.3-0.5 seems to be most ef fective in attenuating the mean pressure around the prism model acting on t he prism surface and turbulent kinetic energy. (C) 2001 Published by The Ja pan Society of Fluid Mechanics and Elsevier Science B.V. All rights reserve d.