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A new class of solutions of three-dimensional equations from the Boussinesq paradigm are considered. The corresponding profiles are not localized functions in the sense of the integrability of the square over an infinite domain. For the new…

斑图形成与孤子 · 物理学 2012-02-22 Christo I. Christov

The classical problem of the flow over a circular cylinder at Reynolds number 40 is considered using an accurate pseudo-spectral code. A new set of boundary conditions is proposed to improve the representation of the infinite flow domain,…

流体动力学 · 物理学 2013-10-25 Rémi Gautier , Damien Biau , Eric Lamballais

In this paper, we prove the existence of classical solutions of the Dirichlet problem for a class of quasi-linear elliptic equations on unbounded domains like a cone or a U-type domain. This problem comes from the study of mean curvature…

偏微分方程分析 · 数学 2010-09-17 Huai-Yu Jian , Hong-Jie Ju

The three-dimensional equations of compressible magnetohydrodynamic isentropic flows are considered. An initial-boundary value problem is studied in a bounded domain with large data. The existence and large-time behavior of global weak…

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

We establish new sufficient conditions for the existence of classical hyperbolic quasiperiodic solutions for natural Lagrangian system on Riemannian manifold with time-quasiperiodic force function

数学物理 · 物理学 2013-11-15 Igor Parasyuk

The description of almost periodic or quasiperiodic structures has a long tradition in mathematical physics, in particular since the discovery of quasicrystals in the early 80's. Frequently, the modelling of such structures leads to…

动力系统 · 数学 2011-07-27 José Aliste-Prieto , Tobias Jäger

This paper studies the upper bound of the lifespan of classical solutions of the initial value problems for one dimensional wave equations with quasilinear terms of space-, or time-derivatives of the unknown function. The results are same…

偏微分方程分析 · 数学 2024-09-11 Yuki Haruyama , Hiroyuki Takamura

We prove an existence result for solutions to the stationary Euler equations in a domain with nonsmooth boundary. This is an extension of a previous existence result in smooth domains by Alber (1992). The domains we consider have a boundary…

偏微分方程分析 · 数学 2020-06-19 Douglas Svensson Seth

We prove existence of weak solutions for a diffuse interface model for the flow of two viscous incompressible Newtonian fluids in a bounded domain in two and three space dimensions. In contrast to previous works, we study a new model…

偏微分方程分析 · 数学 2015-06-03 Helmut Abels , Daniel Depner , Harald Garcke

The quasigeostrophic model is a simplified geophysical fluid model at asymptotically high rotation rate or at small Rossby number. We consider the quasigeostrophic equation with dissipation under random forcing in bounded domains. We show…

动力系统 · 数学 2007-05-23 James R. Brannan , Jinqiao Duan , Thomas Wanner

A modified version of the conditional symmetry method, together with the classical method, is used to obtain new classes of elliptic solutions of the isentropic ideal compressible fluid flow in (3+1) dimensions. We focus on those types of…

数学物理 · 物理学 2009-11-13 R. Conte , A. M. Grundland , B. Huard

Quantization in the mini-superspace of a gravity system coupled to a perfect fluid, leads to a solvable model which implies singularity free solutions through the construction of a superposition of the wavefunctions. We show that such…

广义相对论与量子宇宙学 · 物理学 2009-10-31 A. B. Batista , J. C. Fabris , S. V. B. Goncalves , J. Tossa

We consider the initial-boundary-value problem of the isentropic compressible Navier-Stokes-Poisson equations subject to large and non-flat doping profile in 3D bounded domain with slip boundary condition and vacuum. The global…

偏微分方程分析 · 数学 2021-03-08 Yazhou Chen , Bin Huang , Xiaoding Shi

In this work, we consider a Shallow-Water Quasi Geostrophic equation on the sphere, as a model for global large-scale atmospheric dynamics. This equation, previously studied by Verkley (2009) and Schubert et al. (2009), possesses a rich…

流体动力学 · 物理学 2024-05-02 Arnout Franken , Martino Caliaro , Paolo Cifani , Bernard Geurts

Recently there has been an increasing interest for a better understanding of ultra low Reynolds number flows. In this context we present a new setup which allows to efficiently solve the stationary incompressible Navier-Stokes equations in…

流体动力学 · 物理学 2015-05-13 Vincent Heuveline , Peter Wittwer

In the recent paper, the global-in-time inviscid limit of the three-dimensional (3D) isentropic compressible Navier-Stokes equations is considered. First, when viscosity coefficients are given as a constant multiple of density's power…

偏微分方程分析 · 数学 2019-11-21 Yongcai Geng , Yachun Li , Shengguo Zhu

The initial boundary value problem for the three-dimensional incompressible flow of liquid crystals is considered in a bounded smooth domain. The existence and uniqueness is established for both the local strong solution with large initial…

偏微分方程分析 · 数学 2011-12-25 Xiaoli Li , Dehua Wang

The paper examines one-dimensional total variation flow equation with Dirichlet boundary conditions. Thanks to a new concept of "almost classical" solutions we are able to determine evolution of facets -- flat regions of solutions. A key…

偏微分方程分析 · 数学 2011-06-28 Karolina Kielak , Piotr Bogusław Mucha , Piotr Rybka

Stationary flows of an inviscid and incompressible fluid of constant density in the region $D=(0, L)\times \mathbb R^2$, periodic in the second and third variables, are considered. The flux and the Bernoulli function are prescribed at each…

偏微分方程分析 · 数学 2025-05-06 Boris Buffoni , Eric Séré

Blood flow in arterial systems can be described by the three-dimensional Navier-Stokes equations within a time-dependent spatial domain that accounts for the elasticity of the arterial walls. In this article blood is treated as an…

数值分析 · 数学 2018-08-14 Francesco Fambri , Michael Dumbser , Vincenzo Casulli