To have a closed body, a necessary condition is to have

**2D Rankine ovoid:**

Stagnation Points for 2D Rankine ovoid

**3D Rankine ovoid:**

- 1.
- Question: Find the stagnation points for the 3D Rankine ovoid.
- (a)
- Hint: derive the velocity vector .
- (b)
- Hint: solve for .

- 2.
- Question: Find the radius
of the body.
- (a)
- Hint: mass flux at the half body equals .