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Capillary-gravity waves

However, the flow regime of a film cannot be defined uniquely as laminar or turbulent, as in the case of pipe flow, due to the presence of the free surface. Depending on the values of AFr and JVw , the free surface may be smooth, or covered with gravity waves or capillary or mixed capillary-gravity waves of various types. Thus, under suitable conditions, it is possible to have smooth laminar flow, wavy laminar or turbulent flow, where the wavy flows may be subdivided into gravity or capillary... [Pg.154]

Fig. 3. Theoretical streamwise velocity profiles for a 15 Hz capillary-gravity wave. Curves are shown for an ideal inviscid flow, a real flow with zero viscoelasticity, and a surfactant flow with a finite viscoelasticity. All profiles are taken under a wave crest. The wave amplitude wavelength ratio is 1 20... Fig. 3. Theoretical streamwise velocity profiles for a 15 Hz capillary-gravity wave. Curves are shown for an ideal inviscid flow, a real flow with zero viscoelasticity, and a surfactant flow with a finite viscoelasticity. All profiles are taken under a wave crest. The wave amplitude wavelength ratio is 1 20...
Bock EJ (1987) On ripple dynamics I. Microcomputer-aided measurements of ripple propagation. J Colloid Interface Sci 119 326-334 Bock EJ, Hara T (1995) Optical measurements of capillary-gravity wave spectra using a scanning laser slope gauge. J Atmos Oceanic Tech 12 395-403 Bock EJ, Mann JA (1989) On ripple dynamics II. A corrected dispersion relation for surface waves in the presence of surface elasticity. J Colloid Interface Sci 129 501-505... [Pg.89]

Hocking LM (1987) The damping of capillary-gravity waves at rigid boundary. J Fluid Mech 179 253-266... [Pg.127]

Ermakov SA and Kijashko SV (2006) Damping of capillary-gravity waves due to films of insoluble ordinary surfactants and polymers, (this issue)... [Pg.140]

For high enough values of Ga the oscillatory mode is the capillary-gravity wave. The time scales tgr, and cap associated with this twofold wave are much smaller than the viscous and thermal timescales (at least for Pr l, Bo l). Then dissipative effects are relatively weak and the dispersion relation is... [Pg.104]

Evolution equation for transverse (capillary-gravity) waves... [Pg.108]

Garcia-Ybarra, P. L., and Velarde, M. G. (1987) Oscillatory Marangoni-Benard interfacial instability and capillary-gravity waves in single-and two-component liquid layers with or without Soret thermal diffusion. Phys. Fluids 30 1649-1655. [Pg.118]

Rednikov, A. Ye., Colinet, P, Velarde, M. G., and Legros, J. C. (2000) Oscillatory thermocapillary instability in a liquid layer with deformable open surface capillary-gravity waves, longitudinal waves and mode-mixing. J. Non-Equilib. Therm. 25 381-405. [Pg.120]

Longitudinal waves are, to a major extent, related to the tangential stress with a frequency that depends on the viscosity and surface elasticity. They do not exist in non-viscous liquids. Capillary-gravity waves, however, have a frequency that depends on gravity and on surface tension(Laplace-Kelvin overpressure) but not on the viscosity and are admissible in the absence of dissipation. The latter only appears in the damping factor and frequency-deviation in the dispersion relation. [Pg.139]

See other pages where Capillary-gravity waves is mentioned: [Pg.79]    [Pg.82]    [Pg.113]    [Pg.130]    [Pg.177]    [Pg.177]    [Pg.185]    [Pg.186]    [Pg.187]    [Pg.104]    [Pg.105]    [Pg.105]    [Pg.105]    [Pg.105]    [Pg.106]    [Pg.114]    [Pg.139]   
See also in sourсe #XX -- [ Pg.27 , Pg.79 , Pg.82 , Pg.113 , Pg.124 , Pg.129 , Pg.130 , Pg.136 , Pg.138 , Pg.140 , Pg.177 , Pg.185 , Pg.186 , Pg.206 , Pg.274 ]



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