Long description

The figure is a graph of C D (C underscore D) on the vertical axis against Re on the horizontal axis. The vertical scale is logarithmic from 10 to the power of minus 1 to 10 to the power of 2. The vertical scale is logarithmic from 10 to the power of minus 1 to 10 to the power of 7. The graph decreases from the vertical axis following a curve with decreasing gradient to a plateau, then increases a little, then a sharp fall (a notch) and a steady rise at the end. Approximate values are as follows:

Table 6

ReC subscript DComment
0.0160At vertical axis
110Decreasing
103Decreasing
1001Decreasing
10001Plateauing
100001.1Plateauing but rising a little
1 times 10 to the power of 41.1Rising a little more
3 times 10 to the power of 51.1, falling to about 0.5Point where rapid decline starts
10 to the power of 71Final point