Figure 15.
The horizontal axis gives xi from 0 to 4, and the vertical axis gives Reynolds number to power one half times C f from about 3 to 25. The curves for phi 1, 2, 3, 4, and 5 oscillate across xi. They first decrease to about 4 to 8 near xi 0.4, then rise to repeated peaks. Higher phi values generally have higher peaks, reaching about 22 to 23 after xi 2.Impact of hybrid nanofluids on