Figure 5.
The horizontal axis gives xi from 0 to 4, and the vertical axis gives Reynolds number to power one half times C f from negative 10 to 30. The legend lists epsilon 0.5, epsilon 1.0, and epsilon 1.5. The curves oscillate across xi, with repeated peaks becoming closer as xi increases. The lower curves range from about negative 5 to 8. The upper curves range from about 3 to 23. Higher R i values increase the curve height.Variations of Ri and on