摘要: The drainage of liquid foams involves the interplay gravity, surface tension, and viscous forces. Three experimentally accessible configurations are modeled analytically using a one-dimensional nonlinear partial differential equation called foam equation: free where drains from an initially uniform fixed length, wetting dry foam, pulsed finite blob spreads in otherwise foam. Similarity solutions described each case compared with numerical available experimental data. model is generalized to higher dimensions used discuss further examples drainage.
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