Creeping Flow Past a Sphere

Comparisons of Different Drag Laws

 Figures 4 and 5 compare various drag laws and their ranges of applicability. It is seen that the Stokes and Oseen drag are valid for very small Reynolds numbers. The empirical equation given by (35), however, covers a the entire range of Reynolds number up to about 1000.

Figure 4. Predictions of various models for drag coefficient for a spherical particle.

Figure 5. Predictions of various models for drag coefficient for a spherical particle.