Journal ArticleDOI
On cross-waves
TLDR
In this paper, a second-order theory of the modes of oscillation of water in a tank with a free surface and wave-makers at each end leads to a form of Mathieu's equation for the amplitude of the cross-waves, which are thus an example of parametric resonance and may be excited at half the wave-maker frequency if this is within a narrow band.Abstract:
Cross-waves are standing waves with crests at right angles to a wave-maker. They generally have half the frequency of the wave-maker and reach a steady state at some finite amplitude. A second-order theory of the modes of oscillation of water in a tank with a free surface and wave-makers at each end leads to a form of Mathieu's equation for the amplitude of the cross-waves, which are thus an example of parametric resonance and may be excited at half the wave-maker frequency if this is within a narrow band. The excitation depends on the amplitude of the wave-maker at the surface and the integral over depth of its amplitude. Cross-waves may be excited even if the mean free surface is stationary. The effects of finite amplitude are that the cross-waves approach a steady state such that a given amplitude is achieved at a frequency greater than that for free waves by an amount proportional to the amplitude of the wave-maker. The theory agrees reasonably well with the experimental results of Lin & Howard (1960). The amplification of the cross-waves may be understood in terms of the rate of working of the wave-maker against transverse stresses associated with the cross-waves, one located at the surface and the other equal to Miche's (1944) depth-independent second-order pressure. The theory applies to the situation where the primary motion consists of standing waves and the cross-waves are constant in amplitude away from the wave-maker, but certain generalizations may be made to the situation where the primary waves are progressive and the cross-waves decay away from the wave-maker.read more
Citations
More filters
Journal ArticleDOI
Reply [to “Comment on paper by A. J. Bowen and D. L. Inman, ‘Edge wave and crescentic bars’”]
Journal ArticleDOI
Oblique cross-waves in horizontally vibrated containers
TL;DR: In this article, the properties of threshold patterns are obtained and discussed for the free surface of a horizontally vibrated, rectangular container of liquid and two distinct regimes are considered: (1) large containers where the subharmonic waves generated at each endwall do not interact appreciably and (2) smaller containers where interaction occurs.
Journal Article
Viscous cross-waves: an analytical treatment.
TL;DR: In this article, a formalism using matched asymptotic expansions and an improved method of computing the solvability condition is used to derive the relative contributions of the free surface, sidewall, bottom, and wavemaker viscous boundary layers.
Dissertation
Vibrated Fluids in Microgravity
Fernández Fraile,José Javier +1 more
TL;DR: In this paper, Jones et al. investigate the comportamiento of liquidos in the presence of vibraciones tanto in entornos con gravedad como ingravidos.
References
More filters
Journal ArticleDOI
The stability of the plane free surface of a liquid in vertical periodic motion
Thomas Brooke Benjamin,F. Ursell +1 more
TL;DR: In this article, the stability of the plane free surface is investigated theoretically when the vessel is a vertical cylinder with a horizontal base, and the liquid is an ideal frictionless fluid making a constant angle of contact of 90° with the walls of the vessel.
Mouvements ondulatoires de la mer en profondeur constante ou décroissante
TL;DR: In this article, the authors confronterons dans l'ordre ci-dessus, les faits avec les theories en cours, nous en indiquerons.
Journal ArticleDOI
Rip currents: 2. Laboratory and field observations
TL;DR: In this paper, the nearshore circulation of water on a plane beach exposed to a uniform wave train, normally incident on the beach, was investigated experimentally in the laboratory and it was found that the interaction between these edge waves and the incident waves gave rise to steady flow patterns.
Journal ArticleDOI
Part II. Finite Periodic Stationary Gravity Waves in a Perfect Liquid
W. G. Penney,A. T. Price +1 more
TL;DR: In this paper, a method of successive approximation to the solution of the hydrodynamical equations is formulated, and the solution is carried to the fifth order for the case of two-dimensional waves on a deep liquid.
Journal ArticleDOI
An experimental study of standing waves
TL;DR: In this article, the amplitude-frequency curve of a wave with a small amplitude and at frequencies where great amplification occurred, owing to resonance, is shown to have two non-intersecting branches, a result which can be explained theoretically.