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We consider the free boundary problem for a 3-dimensional, incompressible, irrotational liquid drop of nearly spherical shape with capillarity. We study the problem from the beginning, extending some classical results from the flat case…

偏微分方程分析 · 数学 2026-03-31 Pietro Baldi , Vesa Julin , Domenico Angelo La Manna

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…

偏微分方程分析 · 数学 2025-05-20 Giuseppe La Scala

In this paper we mainly investigate the traveling wave solution of the two dimensional Euler equations with gravity at the free surface over a flat bed. We assume that the free surface is almost periodic in the horizontal direction. Using…

偏微分方程分析 · 数学 2018-05-24 Wei Luo , Zhaoyang Yin

The so-called Whitham equation arises in the modeling of free surface water waves, and combines a generic nonlinear quadratic term with the exact linear dispersion relation for gravity waves on the free surface of a fluid with finite depth.…

斑图形成与孤子 · 物理学 2017-03-08 Filippo Remonato , Henrik Kalisch

We study the bifurcation of periodic travelling waves of the capillary-gravity Whitham equation. This is a nonlinear pseudo-differential equation that combines the canonical shallow water nonlinearity with the exact (unidirectional)…

偏微分方程分析 · 数学 2019-01-14 Mats Ehrnström , Mathew A. Johnson , Ola I. H. Maehlen , Filippo Remonato

We consider the global bifurcation problem for spatially periodic traveling waves for two-dimensional gravity-capillary vortex sheets. The two fluids have arbitrary constant, non-negative densities (not both zero), the gravity parameter can…

偏微分方程分析 · 数学 2014-12-30 David M. Ambrose , Walter A. Strauss , J. Douglas Wright

We construct global curves of rotational traveling wave solutions to the $2D$ water wave equations on a compact domain. The real analytic interface is subject to surface tension, while gravitational effects are ignored. In contrast to the…

偏微分方程分析 · 数学 2024-07-25 Gary Moon , Yilun Wu

By a bifurcation argument we prove that the capillary-gravity Whitham equation features asymmetrical periodic travelling wave solution of arbitrarily small amplitude. Such waves exist only in the weak surface tension regime…

偏微分方程分析 · 数学 2024-01-23 Ola Mæhlen , Douglas Svensson Seth

We study steady axisymmetric water waves with general vorticity and swirl, subject to the influence of surface tension. This can be formulated as an elliptic free boundary problem in terms of Stokes' stream function. A change of variables…

偏微分方程分析 · 数学 2023-06-14 André Erhardt , Erik Wahlén , Jörg Weber

This paper presents a pioneering investigation into the existence of traveling wave solutions for the two-dimensional Euler equations with constant vorticity in a curved annular domain, where gravity acts radially inward. This configuration…

偏微分方程分析 · 数学 2025-09-22 Liang Li , Quan Wang

We study isoperimetric problems modeled on the liquid drop model, with nonlocal interactions under a volume constraint. While balls are natural critical points, we show that, for an unbounded sequence of radii, non-spherical solutions…

偏微分方程分析 · 数学 2026-04-22 Fabio De Regibus , Massimo Grossi , Monica Musso

We study bifurcation for the constant scalar curvature equation along a one-parameter family of Riemannian metrics on the total space of a harmonic Riemannian submersion. We provide an existence theorem for bifurcation points and a…

微分几何 · 数学 2018-08-17 Nobuhiko Otoba , Jimmy Petean

We study two-dimensional periodic capillary-gravity water waves propagating at the free surface of water in a flow with arbitrary, prescribed vorticity over a flat bed. Using conformal mappings and a new Babenko-type reformulation of…

偏微分方程分析 · 数学 2023-06-14 Erik Wahlén , Jörg Weber

We study the motion of an interface between two irrotational, incompressible fluids, with elastic bending forces present; this is the hydroelastic wave problem. We prove a global bifurcation theorem for the existence of families of…

偏微分方程分析 · 数学 2025-08-19 Benjamin F. Akers , David M. Ambrose , Davia W. Sulon

This study analyzes steady periodic hydroelastic waves propagating on the water surface of finite depth beneath nonlinear elastic membranes. Unlike previous work \cite{BaldiT,BaldiT1,Toland,Toland1}, our formulation accommodates rotational…

偏微分方程分析 · 数学 2025-08-07 Yong Zhang

We investigate the emergence of finite-amplitude non-zonal flows on the sphere $\mathbb{S}^2$ arising from stationary solutions to the 2D Euler equations. By restricting the Laplace-Beltrami eigenspace to the invariant subspace of the…

偏微分方程分析 · 数学 2026-04-14 Yuri Cacchiò

We find a new class of solutions that are traveling waves on the boundary of two--dimensional droplet of ideal fluid. We assume that the free surface is subject only to the force of surface tension, and the fluid flow is potential. We use…

流体动力学 · 物理学 2019-11-20 Sergey A. Dyachenko

We study fully three-dimensional droplets that slide down an incline by employing a thin-film equation that accounts for capillarity, wettability, and a lateral driving force in small-gradient (or long-wave) approximation. In particular, we…

流体动力学 · 物理学 2016-12-15 Sebastian Engelnkemper , Markus Wilczek , Svetlana V. Gurevich , Uwe Thiele

Planes and circular cylinders are models of interfaces of a fluid when the support surface is translationally invariant in a direction of the space. After a study of the eigenvalues of the Jacobi operator, it is investigated when planar…

微分几何 · 数学 2025-05-05 Rafael López

We consider a continuum active polar fluid model for the spreading of epithelial monolayers introduced by R. Alert, C. Blanch-Mercader, and J. Casademunt, 2019. The corresponding free boundary problem possesses flat front traveling wave…

偏微分方程分析 · 数学 2023-11-07 Leonid Berlyand , Antonina Rybalko , Volodymyr Rybalko , Clarke Alex Safsten
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