Fig. 7
From: Wind tunnel measurements of turbulent boundary layer flows over arrays of ribs and cubes
Shaded contours of joint probability density function (JPDF) P (u″, w″) and line contours of covariance integrand u″w″P(u″, w″) at canopy height (z = h) of P4 measured over the rib-type arrays of a AR = 1, b AR = 1/2, c AR = 1/4, and d AR = 1/8 and cube-type arrays of e 1h:1l, f 1h:2l, g 1h:4l, and h 1h:4l-T