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We study stationary configurations of compressible barotropic fluids lying inside an incompressible fluid and acted upon by a constant gravitational field. Without gravity, it is a simple matter to construct solutions consisting of…

偏微分方程分析 · 数学 2025-08-27 Juhi Jang , Ian Tice

We consider the initial boundary value problem for a model system of one-dimensional equations which describe unsteady polytropic motions of a mixture of viscous compressible fluids. We prove the global existence and uniqueness theorem for…

偏微分方程分析 · 数学 2017-11-22 Dmitriy Prokudin

For general hyperbolic systems of conservation laws we show that dissipative weak solutions belonging to an appropriate Besov space $B^{\alpha,\infty}_q$ and satisfying a one-sided bound condition are unique within the class of dissipative…

偏微分方程分析 · 数学 2020-07-22 Shyam Sundar Ghoshal , Animesh Jana , Konstantinos Koumatos

We study the problem of propagation of regularity of solutions to the incompressible viscous non-resistive magneto-hydrodynamics system. According to scaling, the Sobolev space $H^{\frac n2-1}(\mathbb R^n)\times H^{\frac n2}(\mathbb R^n)$…

偏微分方程分析 · 数学 2018-03-15 Mimi Dai

In this paper, we are concerned with the global well-posedness of 3D inhomogeneous incompressible Navier-Stokes equations with density-dependent viscosity when the initial velocity is sufficiently small in the critical Besov space…

偏微分方程分析 · 数学 2024-01-19 Dongjuan Niu , Lu Wang

We are concerned with the existence and uniqueness issue for the inhomogeneous incompressible Navier-Stokes equations supplemented with H^1 initial velocity and only bounded nonnegative density. In contrast with all the previous works on…

偏微分方程分析 · 数学 2017-06-27 Raphaël Danchin , Piotr Boguslaw Mucha

We present a new regularized Oldroyd-B model in three dimensions which satisfies an energy estimate analogous to that of the standard model, and maintains the positive semi-definiteness of the conformation tensor. This results in the unique…

偏微分方程分析 · 数学 2025-07-14 Jaroslaw S. Jaracz , Young Ju Lee

We study an anisotropic system arising in magnetohydrodynamics (MHD) in the whole space R^3 , in the case where there are no diffusivity in the vertical direction and only a small diffusivity in the horizontal direction (of size…

偏微分方程分析 · 数学 2017-08-15 Van-Sang Ngo

The present paper is dedicated to the global well-posedness for the 3D inhomogeneous incompressible Navier-Stokes equations, in critical Besov spaces without smallness assumption on the variation of the density. We aim at extending the work…

偏微分方程分析 · 数学 2016-08-09 Xiaoping Zhai , Zhaoyang Yin

We study a three-dimensional, incompressible, viscous, micropolar fluid with anisotropic microstructure on a periodic domain. Subject to a uniform microtorque, this system admits a unique nontrivial equilibrium. We prove that when the…

偏微分方程分析 · 数学 2024-02-14 Antoine Remond-Tiedrez , Ian Tice

In this paper we apply the approach of formal asymptotic expansions and perturbation theory to derive a new highly nonlinear shallow-water model from the full governing equations for two dimensional incompressible fluid with constant…

偏微分方程分析 · 数学 2024-01-17 Yu Liu , Xingxing Liu , Min Li

This investigation deals with some exact solutions of the equations governing the steady plane motions of an incompressible third grade fluid by using complex variables and complex functions. Some of the solutions admit, as particular…

数学物理 · 物理学 2008-06-16 Saifullah

We concern with the global existence and large time behavior of compressible fluids (including the inviscid gases, viscid gases, and Boltzmann gases) in an infinitely expanding ball. Such a problem is one of the interesting models in…

偏微分方程分析 · 数学 2018-09-26 Gang Xu , Huicheng Yin

A new proof is given of the fact that the particle trajectories of the ideal incompressible fluid are analytic curves, though the solutions of the Euler equations may have a finite regularity. This is a consequence of a general fact that…

偏微分方程分析 · 数学 2012-05-29 Alexander Shnirelman

We study a fundamental model in fluid mechanics--the 3D gravity water wave equation, in which an incompressible fluid occupying half the 3D space flows under its own gravity. In this paper we show long-term regularity of solutions whose…

偏微分方程分析 · 数学 2020-09-15 Fan Zheng

We examine the behaviour of homogeneous, anisotropic space-times, specifically the locally rotationally symmetric Bianchi types $I$ and $VII_o$ in the presence of anisotropic matter. By finding an appropriate constant of the motion, and…

广义相对论与量子宇宙学 · 物理学 2016-04-29 David Sloan

In this paper, we consider the Dirichlet problem of inhomogeneous incompressible nematic liquid crystal equations in bounded smooth domains of two or three dimensions. We prove the global existence and uniqueness of strong solutions with…

偏微分方程分析 · 数学 2015-03-13 Jinkai Li

In this paper we consider the inviscid SQG equation on the Sobolev spaces $H^s(\R^2)$, $s > 2$. Using a geometric approach we show that for any $T > 0$ the corresponding solution map, $\theta(0) \mapsto \theta(T)$, is nowhere locally…

偏微分方程分析 · 数学 2016-09-29 Hasan Inci

We are concerned with the vortex sheet solutions for the inviscid two-phase flow in two dimensions. In particular, the nonlinear stability and existence of compressible vortex sheet solutions under small perturbations are established by…

偏微分方程分析 · 数学 2020-01-03 Feimin Huang , Dehua Wang , Difan Yuan

This work is devoted to the study of non-Newtonian fluids of grade three on two-dimensional and three-dimensional bounded domains, driven by a nonlinear multiplicative Wiener noise. More precisely, we establish the existence and uniqueness…

概率论 · 数学 2024-02-27 Yassine Tahraoui , Fernanda Cipriano