Figure 8.
The plot compares R e raised to minus 1 over 2 N u against xi. The horizontal axis is xi and ranges from about 0.4 to 1.5. The vertical axis is R e raised to minus 1 over 2 N u and ranges from minus 2 to above 1. The legend states epsilon equals 0.1 for solid curves and equals 0.4 for dashed curves. The M values are 0, 2, and 4. All curves begin slightly above 0 and rise gradually until about xi 1.0. Some curves then oscillate with larger peaks and troughs. One solid curve drops below minus 1.8 near xi about 1.45. Another curve rises above 1 near xi about 1.35. An arrow points downward through the curve group to mark the M progression.Variations of M and on Nusselt number