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Here we provide uniqueness of vanishing viscosity solutions to sub-Riemannian mean curvature flow problem, which was known only far from characteristic points or under special symmetry condition. We employ vanishing viscosity approach and…

偏微分方程分析 · 数学 2018-08-01 Emre Baspinar , Giovanna Citti

We consider the quasistationary Stokes flow that describes the motion of a two-dimensional fluid body under the influence of surface tension effects in an unbounded, infinite-bottom geometry. We reformulate the problem as a fully nonlinear…

偏微分方程分析 · 数学 2024-04-25 Georg Prokert , Bogdan-Vasile Matioc

The low-Reynolds-number Stokes flow driven by rotation of two parallel cylinders of equal unit radius is investigated by both analytical and numerical techniques. In Part I, the case of counter-rotating cylinders is considered. A numerical…

流体动力学 · 物理学 2024-02-07 E. Dormy , H. K. Moffatt

We develop a new boundary condition for the weak inverse mean curvature flow, which gives canonical and non-trivial solutions in bounded domains. Roughly speaking, the boundary of the domain serves as an outer obstacle, and the evolving…

微分几何 · 数学 2025-02-10 Kai Xu

In this paper, we generalize the famous Hasimoto's transformation by showing that the dynamics of a closed unidimensional vortex filament embedded in a three-dimensional manifold of constant curvature gives rise under Hasimoto's…

微分几何 · 数学 2012-04-25 Mathieu Molitor

We investigate the flow of a one-dimensional nonlinear Schrodinger model with periodic boundary conditions past an obstacle, motivated by recent experiments with Bose--Einstein condensates in ring traps. Above certain rotation velocities,…

Our first purpose is to extend the results from \cite{T} on the radial defocusing NLS on the disc in $\mathbb{R}^2$ to arbitrary smooth (defocusing) nonlinearities and show the existence of a well-defined flow on the support of the Gibbs…

偏微分方程分析 · 数学 2015-08-12 Jean Bourgain , Aynur Bulut

This paper contains a new proof of the short-time existence for the flow by curvature of a network of curves in the plane. Appearing initially in metallurgy and as a model for the evolution of grain boundaries, this flow was later treated…

微分几何 · 数学 2021-01-13 Jorge Lira , Rafe Mazzeo , Alessandra Pluda , Mariel Saez

We search for non-trivial relativistic solutions of the hydrodynamic equations with quasi-inertial flows such as in the Bjorken-like models. The problem is analyzed in general and the known results are reproduced by a method proposed. A new…

核理论 · 物理学 2007-05-23 Yu. M. Sinyukov , Iu. A. Karpenko

We establish the existence of solutions to common noise McKean-Vlasov martingale problems for coefficients with low regularity. Our approach is able to handle the key challenge posed by drift coefficients that are discontinuous with respect…

概率论 · 数学 2025-09-01 Robert Alexander Crowell

We theoretically and experimentally investigate the flow field that emerges from a rod-like microrotor rotating about its center in a non-axisymmetric manner. A simple theoretical model is proposed that uses a superposition of two rotlets…

流体动力学 · 物理学 2016-02-24 Jannis Köhler , Jan Friedrich , Andreas Ostendorf , Evgeny Gurevich

We prove a new smoothing type property for solutions of the 1d quintic Schr\"odinger equation. As a consequence, we prove that a family of natural gaussian measures are quasi-invariant under the flow of this equation. In the defocusing…

偏微分方程分析 · 数学 2021-08-23 F. Planchon , N. Tzvetkov , N. Visciglia

The goal of this numerical study is to get insight into singular solutions of the two-dimensional (2D) Euler equations for non-smooth initial data, in particular for vortex sheets. To this end high resolution computations of vortex layers…

流体动力学 · 物理学 2026-01-06 Julius Bergmann , Thibault Maurel-Oujia , Xi-Yuan , Yin , Jean-Christophe Nave , Kai Schneider

The Hasimoto transformation between the classical LIA (local induction approximation, a model approximating the motion of a thin vortex filament) and the nonlinear Schr\"odinger equation (NLS) has proven very useful in the past, since it…

流体动力学 · 物理学 2014-11-21 Robert A. Van Gorder

We establish existence and uniqueness results for the modified binormal curvature flow equation that generalizes the binormal curvature flow equation for a curve in $\R^3.$ In this generalization, the velocity of the curve is still directed…

偏微分方程分析 · 数学 2014-11-26 Haidar Mohamad

We study a 1D fluid mechanics model with nonlocal velocity. The equation can be viewed as a fractional porous medium flow, a 1D model of the quasi-geostrophic equation, and also a special case of Euler-Alignment system. For strictly…

偏微分方程分析 · 数学 2019-02-13 Changhui Tan

The goal of this paper is to study Yamabe flow on a complete Riemannian manifold of bounded geometry with possibly infinite volume. In the case of infinite volume, standard volume normalization of the Yamabe flow fails and the flow may not…

微分几何 · 数学 2022-10-17 Bruno Caldeira , Luiz Hartmann , Boris Vertman

In this paper, we consider steady Euler flows in a planar bounded domain in which the vorticity is sharply concentrated in a finite number of disjoint regions of small diameter. Such flows are closely related to the point vortex model and…

偏微分方程分析 · 数学 2019-10-10 Daomin Cao , Guodong Wang , Weicheng Zhan

This work studies Willmore flows of tori and their singularities via a dimension reduction approach. We introduce a Willmore flow that preserves the degenerate constraint of prescribed conformal class and, for rotationally symmetric initial…

偏微分方程分析 · 数学 2025-02-19 Anna Dall'Acqua , Marius Müller , Fabian Rupp , Manuel Schlierf

The goal of this paper is to discuss some of the results in [31] and [32] and expand upon the work there by proving a global weak existence result as well as a first bubbling analysis in finite time. In addition, an alternative local…

偏微分方程分析 · 数学 2021-12-17 Jerome Wettstein