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

Abstract

The flow characteristics around a two-dimensional triangular-shaped prism located behind a porous wind fence were investigated numerically. The shelter 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 wind fence. The numerical method developed for the present work is based on the 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 terms of numerical convergence for predicting the separated shear flow. The validity of the numerical method developed in the present work has been evaluated by comparing the numerical results with the experimental data. As a result, the numerical predictions show good agreements with the experimental results. The wind fence with a porosity of about 0.3-0.5 seems to be most effective in attenuating the mean pressure around the prism model acting on the prism surface and turbulent kinetic energy. (C) 2001 Published by The Japan Society of Fluid Mechanics and Elsevier Science B.V. All rights reserved.