(deformed_bubble)=
# Deformed bubbles

```{admonition} Summary
* **Subject:** Bubbles of spherical-cap and ellipsodidal shapes are discussed. 
* **Main conclusion:** $u = \sqrt{ \frac{2 \sigma}{\rho d} + \frac{g d}{2} }$
* **Key idea** Viscous contribution is no longer important, while surface tension and inertial effects are of primal importance in drag. 
```

```{toctree} 
:maxdepth: 1

deformed_bubble/spherical_cap
deformed_bubble/wave_analogy
deformed_bubble/negative_lift
```