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The inference of interfacial properties from capillary wave experiments. I. systems with negligible surface viscosity

1971; Elsevier BV; Volume: 37; Issue: 1 Linguagem: Inglês

10.1016/0021-9797(71)90285-2

1095-7103

E. Mayer, J. D. Eliassen,

Ocean Waves and Remote Sensing

Investigation of capillary ripples on a water-air interface (covered with a monomolecular layer of a water-insoluble surface-active agent) has established that an interface may exhibit finite and measurable resistance to changes in shape (bending). In some cases a bending elasticity and a bending viscosity were shown to be needed, along with the more familiar surface tension and interfacial, (two-dimensional) elasticity and viscosity, in order to satisfactorily describe the wavelength and damping coefficient of capillary ripples. Values for all these mechanical parameters have been deduced from regression schemes applied to the experimental data and the characteristic equation for capillary ripples. This equation results from solution of the bulk phase hydrodynamic equations and appropriate interfacial boundary conditions.