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Laplace formula : ウィキペディア英語版 | Laplace formula 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. ==Definition== 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 tension coefficient.
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