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Related papers: Deep-water limit of the intermediate long wave equ…

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In this paper, we establish the unconditional deep-water limit of the intermediate long wave equation (ILW) to the Benjamin-Ono equation (BO) in low-regularity Sobolev spaces on both the real line and the circle. Our main tool is new…

Analysis of PDEs · Mathematics 2025-02-25 Justin Forlano , Guopeng Li , Tengfei Zhao

In this paper, we study the low regularity convergence problem for the intermediate long wave equation (ILW), with respect to the depth parameter $\delta>0$, on the real line and the circle. As a natural bridge between the Korteweg-de Vries…

Analysis of PDEs · Mathematics 2024-07-26 Guopeng Li

We prove that the intermediate long wave (ILW) equation is globally well-posed in the Sobolev spaces $H^s(\mathbb{T})$ for $s > -\frac12$. The previous record for well-posedness was $s\geq 0$, and the system is known to be ill-posed for…

Analysis of PDEs · Mathematics 2025-06-06 Louise Gassot , Thierry Laurens

(Due to the limit on the number of characters for an abstract set by arXiv, the full abstract can not be displayed here. See the abstract in the paper.) We study convergence problems for the intermediate long wave equation (ILW), with the…

Analysis of PDEs · Mathematics 2025-06-02 Guopeng Li , Tadahiro Oh , Guangqu Zheng

We study the intermediate long wave equation (ILW) in negative Sobolev spaces. In particular, despite the lack of scaling invariance, we identify the regularity $s = -\frac 12$ as the critical regularity for ILW with any depth parameter, by…

Analysis of PDEs · Mathematics 2024-04-29 Andreia Chapouto , Justin Forlano , Guopeng Li , Tadahiro Oh , Didier Pilod

We continue our study on the convergence issue of the intermediate long wave equation (ILW) on both the real line and the circle. In particular, we establish convergence of the scaled ILW dynamics to that of the Korteweg-de Vries equation…

Analysis of PDEs · Mathematics 2025-11-21 Andreia Chapouto , Guopeng Li , Tadahiro Oh , Tengfei Zhao

A model for the wave motion of an internal wave in the presence of current in the case of intermediate long wave approximation is studied. The lower layer is considerably deeper, with a higher density than the upper layer. The flat surface…

Fluid Dynamics · Physics 2024-06-04 Joseph Cullen , Rossen Ivanov

In this paper, we give the first rigorous justification of the Benjamin-Ono equation as an internal water wave model on the physical time scale. Let $\varepsilon$ be the small parameter measuring the weak nonlinearity of the waves, $\mu$ be…

Analysis of PDEs · Mathematics 2024-10-31 Martin Oen Paulsen

We study the construction of invariant measures associated with higher order conservation laws of the intermediate long wave equation (ILW) and their convergence properties in the deep-water and shallow-water limits. By exploiting its…

Analysis of PDEs · Mathematics 2024-09-12 Andreia Chapouto , Guopeng Li , Tadahiro Oh

This survey is focused on two asymptotic models for internal waves, the Benjamin-Ono (BO) and Intermediate Long Wave (ILW) equations that are integrable by inverse scattering techniques (IST). After recalling briefly their derivations we…

Analysis of PDEs · Mathematics 2018-11-22 Jean-Claude Saut

This article represents a first step toward understanding the long-time dynamics of solutions for the Intermediate Long Wave equation (ILW). While this problem is known to be both completely integrable and globally well-posed in…

Analysis of PDEs · Mathematics 2023-11-21 Mihaela Ifrim , Jean-Claude Saut

We investigate regularity properties of the solution map for the intermediate long wave equation (ILW) on the real line. More precisely, we study the scaled ILW which was shown to converge to the Korteweg-de Vries equation (KdV) in…

Analysis of PDEs · Mathematics 2026-02-25 Andreia Chapouto , Benjamin Harrop-Griffiths , Guopeng Li , Tadahiro Oh

A model for internal interfacial waves between two layers of fluid in the presence of current and variable bottom is studied in the flat-surface approximation. Fluids are assumed to be incompressible and inviscid. Another assumption is that…

Pattern Formation and Solitons · Physics 2025-07-08 Rossen Ivanov , Lyudmila Ivanova

We present a comprehensive introduction and overview of a recently derived model equation for waves of large amplitude in the context of shallow water waves and provide a literature review of all the available studies on this equation.…

Analysis of PDEs · Mathematics 2020-11-04 Nilay Duruk Mutlubas , Anna Geyer , Ronald Quirchmayr

We study the small dispersion limit of the intermediate long wave (ILW) equation, specifically on a class of well-behaved initial conditions $u_0$ where the number of solitons in the solution increases without bound. First, we conduct a…

Analysis of PDEs · Mathematics 2026-02-10 Matthew Dominique Mitchell

In this paper we are concerned with a initial boundary-value problem for a coupled system of two KdV equations, posed on the positive half line, under the effect of a localized damping term. The model arises when modeling the propagation of…

Analysis of PDEs · Mathematics 2012-12-10 Ademir Fernando Pazoto , Gilmar dos Reis Souza

We investigate models of dispersive long internal waves with rotational effects, specifically the Benjamin-Ono (BO) and intermediate long wave (ILW) equations modified by the presence of the nonlocal operator $\partial_x^{-1}$, which…

Analysis of PDEs · Mathematics 2025-03-20 Ricardo Freire , Thyago S. R. Santos

We consider a density-stratified fluid composed of two immiscible layers separated by a sharp interface. We study the regime of long internal waves interacting with modulated surface wave packets and describe their resonant interaction by a…

Analysis of PDEs · Mathematics 2024-08-22 Adilbek Kairzhan , Christopher Kennedy , Catherine Sulem

In this work, we focus on the stability of $n$-soliton solutions ($n\in \mathbb{N}, n\geq 1$) to the completely integrable intermediate long wave equation (ILW), which models long internal gravity waves in a stratified fluid of finite…

Analysis of PDEs · Mathematics 2025-12-10 Zhen Lu , Shou-Fu Tian

The aim of this paper is to establish the existence of solitary wave solutions for two classes of two-layers systems modeling the propagation of internal waves. More precisely we will consider the Boussinesq-Full dispersion system and the…

Analysis of PDEs · Mathematics 2018-04-09 Jaime Angulo Pava , Jean-Claude Saut
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