Regions of Positive Vorticity in Steady Axisymmetric Flow Past a Viscous Spherical Drop

Figure 1

Spherical polar coordinate system (𝑟,𝜃,𝜙) for axisymmetric flow past a liquid drop. If 𝜌>𝜌, the gravity vector 𝐠 points in the direction shown while if 𝜌<𝜌, 𝐠 points in the opposite direction.