Compute the pressure difference across a curved interface from surface tension γ and the bubble or droplet radius of curvature R using ΔP = 2γ/R, for soap bubbles, droplets and alveolar mechanics.
输入表面张力 γ 与曲率半径 R，求内外压差。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Spherical pressure jump | Δp = 2σ/r | Young-Laplace equation, 1805 |
| Bubble special case | Soap bubble: Δp = 4σ/r | Interfacial science texts |