Figure 1.
The cylinder surface is labelled U w and T w, with diameter 2 R marked across the cylinder. The vertical axis is labelled z, u, with z 0 at the base, and the horizontal axis is labelled r, v. Gravity g points downward. A free-stream arrow labelled U infinity points upward beside T infinity. A velocity boundary curve rises from the base near the cylinder and approaches the free-stream region.Flow model and coordinate system