Fluid flows past the two-dimensional bar shown in Fig. P9.2. The pressures on the ends of the

Question:

Fluid flows past the two-dimensional bar shown in Fig. P9.2. The pressures on the ends of the bar are as shown, and the average shear stress on the top and bottom of the bar is $\tau_{\text {avg. }}$. Assume that the drag due to pressure is equal to the drag due to viscous effects.

(a) Determine $\tau_{\text {avg }}$ in terms of the dynamic pressure, $ho U^{2} / 2$.

(b) Determine the drag coefficient for this object.

Figure P9.2