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In this paper, we prove global regularity for all smooth, axisymmetric, swirl-free solutions of the Euler equation in four dimensions. Previous works establishing global regularity for certain axisymmetric, swirl-free solutions of the Euler…

Analysis of PDEs · Mathematics 2026-04-15 Evan Miller

We study the Cauchy problem for the Schr\"odinger-improved Boussinesq system in a two dimensional domain. Under natural assumptions on the data without smallness, we prove the existence and uniqueness of global strong solutions. Moreover,…

Analysis of PDEs · Mathematics 2022-01-11 Tohru Ozawa , Kenta Tomioka

We prove a long time existence result for the solutions of a two-dimensional Boussinesq system modeling the propagation of long, weakly nonlinear water waves. This system is exceptional in the sense that it is the only linearly well-posed…

Analysis of PDEs · Mathematics 2020-09-08 Jean-Claude Saut , Li Xu

In our recent work dedicated to the Boussinesq equations [Danchin and Zhang 2016], we established the persistence of solutions with piecewise constant temperature along interfaces with H\"older regularity. We here address the same problem…

Analysis of PDEs · Mathematics 2016-12-02 Raphaël Danchin , Xin Zhang

In this paper we prove a global well-posedness result for tridimensional Navier-Stokes-Boussinesq system with axisymmetric initial data. This system couples Navier-Stokes equations with a transport equation governing the density.

Analysis of PDEs · Mathematics 2009-08-07 Hamadi Abidi , Taoufik Hmidi , Sahbi Keraani

We consider in a smooth and bounded two dimensional domain the convergence in the $L^2$ norm, uniformly in time, of the solution of the stochastic second-grade fluid equations with transport noise and no-slip boundary conditions to the…

Analysis of PDEs · Mathematics 2023-08-24 Eliseo Luongo

In this paper, we consider the global solutions to a generalized 2D Boussinesq equation \begin{align*} \left \{\begin{aligned} & \partial_{t} \omega + u\cdot \nabla \omega + \nu \Lambda^{\alpha} \omega = \theta_{x_{1}} , \quad \\ & u =…

Analysis of PDEs · Mathematics 2014-11-03 Junxiong Jia , Jigen Peng , Kexue Li

We prove that the solution to the singular-degenerate stochastic fast-diffusion equation with parameter $m\in (0,1)$, with zero Dirichlet boundary conditions on a bounded domain in any spatial dimension, and driven by linear multiplicative…

Analysis of PDEs · Mathematics 2024-02-26 Ioana Ciotir , Dan Goreac , Jonas M. Tölle

We establish the global-in-time well-posedness of the two-dimensional incompressible Navier-Stokes equations with freely transported viscosity coefficient, under a scaling-invariant smallness condition on the initial data. The viscosity…

Analysis of PDEs · Mathematics 2024-09-11 Xian Liao , Rebekka Zimmermann

We prove sharp regularity estimates for solutions of highly degenerate fully nonlinear elliptic equations. These are free boundary models in which a nonlinear diffusion process drives the system only in the region where the gradient…

Analysis of PDEs · Mathematics 2024-01-17 Damião Araújo , Aelson Sobral , Eduardo V. Teixeira

In this paper we study the validity of the so-called Oberbeck-Boussinesq approximation for compressible viscous perfect gases in the whole three-dimensional space. Both the cases of uids with positive heat conductivity and zero conductivity…

Analysis of PDEs · Mathematics 2013-04-17 Raphaël Danchin , Lingbing He

In this work, we study some special properties of smoothness concerning to the initial value problem associated with the Zakharov-Kuznetsov-(ZK) equation in the $n-$ dimensional setting, $n\geq 2.$ It is known that the solutions of the ZK…

Analysis of PDEs · Mathematics 2020-08-27 A. J. Mendez

In this article, we consider the Ericksen-Leslie's hyperbolic system for incompressible liquid crystal model without kinematic transport in three spatial dimensions, which is a nonlinear coupling of incompressible Navier-Stokes equations…

Analysis of PDEs · Mathematics 2021-07-05 Jiaxi Huang , Ning Jiang , Yi-Long Luo , Lifeng Zhao

Here we prove the all-time propagation of the Sobolev regularity for the velocity field solution of the two-dimensional compressible Navier-Stokes equations, provided the volume (bulk) viscosity coefficient is large enough. The initial…

Analysis of PDEs · Mathematics 2021-03-03 Raphaël Danchin , Piotr Boguslaw Mucha

In this paper, we study minimizers of the Chon\'e--Rochet variational problem in dimension two. We first establish global $C^1$ regularity on arbitrary bounded convex domains, and then prove global $C^{1,1}$ regularity on bounded strictly…

Analysis of PDEs · Mathematics 2026-03-24 Shibing Chen , Alessio Figalli , Yi Ru-Ya Zhang

Let rarefied gas be confined in an infinite layer with diffusely reflecting boundaries that are isothermal and non-moving. The initial-boundary value problem on the nonlinear Boltzmann equation governing the rarefied gas flow in such…

Analysis of PDEs · Mathematics 2025-08-26 Hongxu Chen , Renjun Duan , Junhao Zhang

We consider the reactive Boussinesq equations in a slanted cylinder, with zero stress boundary conditions and arbitrary Rayleigh number. We show that the equations have non-planar traveling front solutions that propagate at a constant…

Analysis of PDEs · Mathematics 2007-05-23 H. Berestycki , P. Constantin , L. Ryzhik

For $\mathbb{R}^2$, the stability of smooth solutions of 2D anisotropic Boussinesq equations with horizontal dissipation is an open problem. In this work, we present a partial answer to this problem in a rougher function space…

Analysis of PDEs · Mathematics 2024-01-29 Hong Sung Jin , Minkyu Kwak , Bataa Lkhagvasuren

Two-dimensional Boussinesq convection is studied numerically with very fine spatial resolutions up to 4096^2. Our numerical study starts with a smooth asymmetric initial condition, which is chosen to make the flow field well confined in the…

Fluid Dynamics · Physics 2009-09-29 Z. Yin , Tao Tang

In this paper we study the zero-viscosity limit of $2$-D Boussinesq equations with vertical viscosity and zero diffusivity, which is a nonlinear system with partial dissipation arising in atmospheric sciences and oceanic circulation. The…

Analysis of PDEs · Mathematics 2024-03-26 Mengni Li , Yan-Lin Wang
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