The Laplace formula is a result in fluid mechanics that gives the surface pressure between two continuous media. The surface of separation is really a transitional layer, but it is so thin that in classical mechanics it can be considered a dividing surface between the two media.
Consider two continuous media (top and bottom) whose surface of separation undergoes a small displacement. If and are the principal radii of curvature of the surface in some sample region, then the difference of pressures is
where is the surface pressure.
ERROR alpha is not the surface pressure but the surface-tension coefficient.
- Landau, L.D. and Lifschitz, E.M. Fluid Mechanics. Oxford : Butterworth-Heinemann, 1987.
|This fluid dynamics–related article is a stub. You can help Wikipedia by expanding it.|