3. Producción
Browse
Search Results
- Some of the metrics are blocked by yourconsent settings
Item type:Publication, Auto-resonance process under the interaction of solitons with external force and dissipation(Elsevier Ltd, 2024-12-01)Algebraic soliton interactions with an external force in the presence of Reynolds viscosity is investigated. In the absence of an external force, the soliton amplitude decays over time. However, when an external force is introduced, it acts as a restoring force, and in some cases, the soliton's amplitude is preserved. A dynamical system that governs the soliton amplitude and its crest position is obtained assuming a weak force and weak viscosity. For an external force with a Gaussian shape, the dynamical system has two equilibrium points, namely, a saddle and a stable spiral. Asymptotic results are compared with direct numerical simulations, and a strong qualitative agreement is observed. The stable spiral predicted by the asymptotic theory is stable in the sense that soliton solutions with a chosen amplitude and crest position near the spiral point are attracted to it, preserving their amplitude and location. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Solitons in dissipative systems subjected to random force within the Benjamin–Ono type equation(Elsevier Ltd, 2024-10-01)Solitary wave dynamics is investigated under the assumption of small dissipation and an external random force. Through a change of variables, the problem becomes homogeneous, allowing for the derivation of asymptotic algebraic soliton solutions. This change of variables makes the randomness manifest primarily on the soliton phases. Consequently, the averaged soliton field and the statistical moments can be computed analytically, assuming that the phase follows a uniform distribution. In the absence of Reynolds dissipation, we show that the soliton-averaged field tends to spread and dampen as the dispersion increases. In addition, in the presence of Reynolds dissipation, we demonstrate that algebraic solitons can transition between thick and thin soliton states. Moreover, when there is viscosity in the upper moving layer, the averaged soliton field exhibits a dynamic evolution from soliton to thick soliton to soliton, contingent upon the parameter settings. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Nonlinear random wave fields within a Boussinesq system(Elsevier B.V., 2024-09-28)The dynamics of nonlinear random fields is important for understanding wave turbulence. In this work, we use a Boussinesq system to examine the distinctions between unidirectional and bidirectional waves. Our study demonstrates that in both scenarios, the wave spectra reach a stationary state. Moreover, we show that the occurrence of rogue waves is more probable in the unidirectional case. In the unidirectional case, the probability distribution of wave crests exceeds the one predicted by the Rayleigh distribution once the spectra reach the stationary state. Conversely, in the bidirectional case, the opposite trend is observed. The discovery of various types of rogue waves, including massive wave trains commonly known in the literature as “two sisters” and “three sisters” are found. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Wave fields under the influence of a random-driven force: The Burgers equation(Elsevier B.V., 2024-12-15)In this work, we examine the classical Burgers equation and investigate the effects of a random force on the wave field. Two scenarios are considered: the impact of a random force on different wave fields within the viscous Burgers equation and the effect of a periodic random force in the inviscid Burgers equation. For the first case, we demonstrate that the random force primarily causes wave fronts to increase or decrease depending on the dispersion parameter. For an initially deformed sinusoidal wave, the external force causes the mean wave field to spread out and dampen over time. The Cole-Hopf transformation is also used to obtain asymptotically the averaged wave field in certain regimes. For the inviscid problem, we assume the random force to be periodic with random phase to show that the mean wave field corresponds to the solution of the classical inviscid Burgers equation without external forces.