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The properties of a transformation previously considered for generating new perfect-fluid solutions from known ones are further investigated. It is assumed that the four-velocity of the fluid is parallel to the stationary Killing field, and…

广义相对论与量子宇宙学 · 物理学 2009-10-30 Istvan Racz , Jozsef Zsigrai

We study the evolution of local event-by-event deviations from smooth average fluid dynamic fields, as they can arise in heavy ion collisions from the propagation of fluctuating initial conditions. Local fluctuations around Bjorken flow are…

核理论 · 物理学 2012-08-20 Stefan Floerchinger , Urs Achim Wiedemann

The Euler equations describing two-dimensional steady flows of an inviscid fluid are studied. These equations are reduced to one equation for the stream function and then, using the Hirota function, solutions of three nonlinear elliptic…

流体动力学 · 物理学 2022-02-15 O. V. Kaptsov

In this paper, we establish some local and global solutions for the two phase incompressible inhomogeneous flows with moving interfaces in $L_p-L_q$ maximal regularity class. Compared with previous results obtained by V.A.Solonnikov and by…

偏微分方程分析 · 数学 2018-11-07 Hirokazu Saito , Yoshihiro Shibata , Xin Zhang

(accepted for publication in the Ap.J.) I present a general classification of self-similar solutions to the equations of gravitational hydrodynamics that contain many previous results as special cases. For cold flows with spherical…

天体物理学 · 物理学 2009-10-22 Ue-Li Pen

Linearized stability of incompressible viscous fluid flows in a thin spherical shell is studied by using the two-dimensional Navier--Stokes equations on a sphere. The stationary flow on the sphere has two singularities (a sink and a source)…

经典分析与常微分方程 · 数学 2009-11-11 Ranis N. Ibragimov , Dmitry E. Pelinovsky

The transition of the flow in a duct of square cross-section is studied. Like in the similar case of the pipe flow, the motion is linearly stable for all Reynolds numbers; this flow is thus a good candidate to investigate the 'bypass' path…

流体动力学 · 物理学 2010-07-02 Damien Biau , Houssam Soueid , Alessandro Bottaro

We present a new integral representation for the unsteady, incompressible Stokes or Navier-Stokes equations, based on a linear combination of heat and harmonic potentials. For velocity boundary conditions, this leads to a coupled system of…

数值分析 · 数学 2018-09-28 Leslie Greengard , Shidong Jiang

Fluid turbulence is a far-from-equilibrium phenomenon and remains one of the most challenging problems in physics. Two-dimensional, fully developed turbulence may possess the largest possible symmetry, the conformal symmetry. We focus on…

高能物理 - 理论 · 物理学 2022-10-14 Jun Nian , Xiaoquan Yu , Jinwu Ye

We provide a integration of Navier-Stokes equations concerning the unsteady-state laminar flow of an incompressible, isothermal (newtonian) fluid in a cylindrical vessel spinning about its symmetry axis, say $z$, and inside which the liquid…

流体动力学 · 物理学 2016-12-14 Alessio Bocci , Giovanni Mingari Scarpello , Daniele Ritelli

The dynamics along the particle trajectories for the 3D axisymmetric Euler equations are considered. It is shown that if the inflow is rapidly increasing (pushy) in time, the corresponding laminar profile of the incompressible Euler flow is…

偏微分方程分析 · 数学 2017-05-15 Tsuyoshi Yoneda

The equations for the three-dimensional incompressible flow of liquid crystals are considered in a smooth bounded domain. The existence and uniqueness of the global strong solution with small initial data are established. It is also proved…

偏微分方程分析 · 数学 2015-05-13 Xianpeng Hu , Dehua Wang

We prove local well-posedness in regular spaces and a Beale-Kato-Majda blow-up criterion for a recently derived stochastic model of the 3D Euler fluid equation for incompressible flow. This model describes incompressible fluid motions whose…

数学物理 · 物理学 2018-11-14 Dan Crisan , Franco Flandoli , Darryl D. Holm

Periodic travelling waves at the free surface of an incompressible inviscid fluid in two dimensions under gravity are numerically computed for an arbitrary vorticity distribution. The fluid domain over one period is conformally mapped from…

流体动力学 · 物理学 2025-02-26 Alex Doak , Vera Mikyoung Hur , Jean-Marc Vanden-Broeck

In this paper, we study the two-dimensional steady compactly supported incompressible Euler equations with free boundaries. We consider flows with constant vorticity that are perturbations of annular equilibria, in contrast to the laminar…

偏微分方程分析 · 数学 2026-04-14 Changfeng Gui , Jun Wang , Wen Yang , Yong Zhang

We investigate the Abels-Garcke-Gr\"un model that describes the motion of two viscous incompressible fluids with unmatched densities in the presence of a uniform gravitational field. For the perturbated system with respect to a given…

偏微分方程分析 · 数学 2025-06-23 Maoyin Lv

The Navier--Stokes equations for incompressible flows past a two--dimensional sphere are considered in this article. The existence of an inertial form of the equations is established. Furthermore for the first time for fluid equations, we…

chao-dyn · 物理学 2008-02-03 Roger Temam , Shouhong Wang

A solution of the linearized Einstein's equations for a spherically symmetric perturbation of the ultrarelativistic fluid in the homogeneous and isotropic universe is obtained. Conditions on the boundary of the perturbation are discussed.…

广义相对论与量子宇宙学 · 物理学 2009-10-28 Yu. Ignat'ev , A. Popov

We consider the Taylor-Couette problem in an infinitely extended cylindrical domain. There exist modulated front solutions which describe the spreading of the stable Taylor vortices into the region of the unstable Couette flow. These…

斑图形成与孤子 · 物理学 2007-05-23 Jean-Pierre Eckmann , Guido Schneider

We will discuss various aspects of the incompressible Euler equation. We will discuss, in particular, problems related to the least action principle, the existence of special solutions, the problem of solvability, singularity formation, and…

偏微分方程分析 · 数学 2025-12-10 Tarek M. Elgindi