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We report an experimental realization of Wilson-Fisher renormalization in driven surface-wave turbulence across Newtonian fluids spanning nearly six decades in Raynolds number. Discrete capillary and gravity turbulence define two…

Fluid Dynamics · Physics 2026-01-16 José A. Santiago , Mikheil Kharbedia , Basilio J. García , Francisco Monroy

We present a theoretical study of nonlinear pattern formation in parametric surface waves for fluids of low viscosity, and in the limit of large aspect ratio. The analysis is based on a quasi-potential approximation to the equations…

patt-sol · Physics 2025-02-25 Wenbin Zhang , Jorge Vinals

We consider the defocusing, cubic nonlinear wave equation with zero Dirichlet boundary value in the exterior $\Omega = \mathbb{R}^3\backslash \bar{ B}(0,1)$. We make use of the distorted Fourier transform in \cite{LiSZ:NLS, Taylor:PDE:II}…

Analysis of PDEs · Mathematics 2025-09-03 Guixiang Xu , Pengxuan Yang

We consider the full irrotational water waves system with surface tension and no gravity in dimension two (the capillary waves system), and prove global regularity and modified scattering for suitably small and localized perturbations of a…

Analysis of PDEs · Mathematics 2017-04-06 Alexandru D. Ionescu , Fabio Pusateri

We consider the free boundary problem for a two-dimensional, incompressible, perfect, irrotational liquid drop of nearly circular shape with capillarity: that is, we consider the 2D version of the 3D capillary drop problem treated in…

Analysis of PDEs · Mathematics 2025-05-20 Giuseppe La Scala

Assuming initial data have small weighted $H^4\times H^3$ norm, we prove global existence of solutions to the Cauchy problem for systems of quasi-linear wave equations in three space dimensions satisfying the null condition of Klainerman.…

Analysis of PDEs · Mathematics 2022-03-29 Kunio Hidano , Kazuyoshi Yokoyama

We consider a multi-fluid system with several free interfaces. For this system we prove existence of three-dimensional steady gravity-capillary waves with non-zero vorticity. We obtain non-zero vorticity by prescribing the relative velocity…

Analysis of PDEs · Mathematics 2023-03-01 Douglas Svensson Seth

In this paper, we investigate the spectral stability of periodic traveling waves in the two dimensional gravity-capillary water wave problem. We derive a stability criterion based on an index function, whose sign determines the spectral…

Analysis of PDEs · Mathematics 2026-02-10 Changzhen Sun , Erik Wahlén

We formulate the two-dimensional gravity-capillary water wave equations in a spatially quasi-periodic setting and present a numerical study of solutions of the initial value problem. We propose a Fourier pseudo-spectral discretization of…

Fluid Dynamics · Physics 2021-05-05 Jon Wilkening , Xinyu Zhao

We review recent progress on the long-time regularity of solutions of the Cauchy problem for the water waves equations, in two and three dimensions. We begin by introducing the free boundary Euler equations and discussing the local…

Analysis of PDEs · Mathematics 2018-02-07 Alexandru D. Ionescu , Fabio Pusateri

This paper is devoted to investigating the rotating Boussinesq equations of inviscid, incompressible flows with both fast Rossby waves and fast internal gravity waves. The main objective is to establish a rigorous derivation and…

Analysis of PDEs · Mathematics 2023-04-18 Claude Bardos , Xin Liu , Edriss S. Titi

We prove an extended lifespan result for the full gravity-capillary water waves system with a $2$ dimensional periodic interface: for initial data of sufficiently small size $\varepsilon$, smooth solutions exist up to times of the order of…

Analysis of PDEs · Mathematics 2019-09-24 A. D. Ionescu , F. Pusateri

The theory of isotropic capillary turbulence was developed in the late 1960s by Zakharov and Filonenko. To date, the analytical solution of the kinetic equation describing the stationary transfer of energy to small scales due to three-wave…

Fluid Dynamics · Physics 2025-04-08 E. A. Kochurin , P. A. Russkikh

In this paper, we first establish a kind of weighted space-time $L^2$ estimate, which belongs to Keel-Smith-Sogge type estimates, for perturbed linear elastic wave equations. This estimate refines the corresponding one established by the…

Analysis of PDEs · Mathematics 2018-02-23 Kunio Hidano , Dongbing Zha

We study the elastic wave system in three spatial dimensions. For admissible harmonic elastic materials, we prove a desired low-regularity local well-posedness result for the corresponding elastic wave equations. For such materials, we can…

Analysis of PDEs · Mathematics 2024-11-26 Xinliang An , Haoyang Chen , Sifan Yu

A new approach to gravitational gauge-invariant perturbation theory begins from the fourth-order Einstein-Ricci system, a hyperbolic formulation of gravity for arbitrary lapse and shift whose centerpiece is a wave equation for curvature. In…

General Relativity and Quantum Cosmology · Physics 2011-04-21 Arlen Anderson , Andrew M. Abrahams , Chris Lea

The aim of this work is to investigate the interaction of gravity-capillary waves resonantly excited by two moving disturbances along the free surface. The problem is formulated using the full Euler equations and numerical computations are…

Fluid Dynamics · Physics 2021-07-19 M. V. Flamarion , R. Ribeiro-Jr

The Buckley-Leverett equation for two phase flow in a porous medium is modified by including a dependence of capillary pressure on the rate of change of saturation. This model, due to Gray and Hassanizadeh, results in a nonlinear…

Analysis of PDEs · Mathematics 2011-09-06 K. Spayd , M. Shearer

In this paper we study the Zakharov system on the upper half--plane $U=\{(x ,y)\in \R^2: y>0\}$ with non-homogenous boundary conditions. In particular we obtain low regularity local well--posedness using the restricted norm method of…

Analysis of PDEs · Mathematics 2025-03-04 M. B. Erdoğan , N. Tzirakis

We consider the capillary-gravity water-waves problem of finite depth with a flat bottom of one or two horizontal dimensions. We derive the modulation equations of leading and next-to-leading order in the hyperbolic scaling for three weakly…

Analysis of PDEs · Mathematics 2016-02-02 Ioannis Giannoulis
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