Figure 3.

Contour plots from numerical simulations of the velocity component u_z in a plane at 1/4 of the channel height from the bottom surface, for the angles ${\alpha }_{fl}=210°\left(a\right);270°\left(b\right);330°\left(c\right)$. White and dark gray contours indicate positive and negative values of u_z, respectively, and gray contours represent vanishing values of u_z. (d) Distribution of u_z (normalized with respect to the mean speed in the channel, U) along the x axis (normalized with respect to W) for different curvatures of the corner. The distances $\overline{y}$ and $\overline{z}$ from the side wall and the bottom of the channel, respectively, were chosen such that $u_z/U$ has the maximum value (shown in the inset as a function of α_fl). The direction of the flow is from left to right.