NUMERICAL STUDY OF WIND FLOW OVER AN ELEVATED ROADWAY

The paper presents the initial results of a numerical study of wind fl ow over an elevated roadway which is also much smoother than the surro unding terrain. The finite volume prediction using a k-epsilon model c losure with wall functions yields a speed-up ratio of DELTAS = 1.2, so mewhat larger than the value of DELTAS = 0.65 measured on a wind tunne l model. The effect of the reduction in surface roughness is almost as great as that of the elevated geometry.