Use when you must compute the steady low-Reynolds-number viscous drag on a sphere in creeping flow, the Stokes solution for the slow motion of a sphere through a viscous fluid: evaluate the stokes streamfunction and the velocity field about the sphere, the surface pressure and wall-shear distributions with their high-pressure-facing-the-stream signature, the total stokes drag F = 6*pi*mu*a*U split one third pressure drag to two thirds friction drag, the drag coefficient Cd = 24/Re_D at the diameter Reynolds number, the Oseen correction factor 1 + (3/8)*Re_a on the radius-based Reynolds number, and the terminal settling velocity (2/9)*(rho_p - rho_f)*g*a^2/mu of a small de…
