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We investigate the dynamics of a 2D Ising model on a square lattice with conservative Kawasaki dynamics in the bulk, coupled with two external reservoirs that pull the dynamics out of equilibrium. Two different mechanisms for the action of…

统计力学 · 物理学 2019-06-26 M. Colangeli , C. Giberti , C. Vernia , M. Kröger

We demonstrate the existence of smooth three-dimensional vector fields where the cross product between the vector field and its curl is balanced by the gradient of a smooth function, with toroidal level sets that are not invariant under…

偏微分方程分析 · 数学 2025-06-02 Naoki Sato , Michio Yamada

We prove that the 3-D compressible Euler equations with surface tension along the moving free-boundary are well-posed. Specifically, we consider isentropic dynamics and consider an equation of state, modeling a liquid, given by Courant and…

偏微分方程分析 · 数学 2012-08-15 Daniel Coutand , Jason Hole , Steve Shkoller

The main objective of this article is to study the nonlinear stability and dynamic transitions of the basic (zonal) shear flows for the three-dimensional continuously stratified rotating Boussinesq model. The model equations are fundamental…

流体动力学 · 物理学 2018-04-04 Taylan Şengül , Shouhong Wang

We study a three-dimensional fluid model describing rapidly rotating convection that takes place in tall columnar structures. The purpose of this model is to investigate the cyclonic and anticyclonic coherent structures. Global existence,…

偏微分方程分析 · 数学 2018-10-09 Chongsheng Cao , Yanqiu Guo , Edriss S. Titi

For a class of external forces, we prove the existence and uniqueness of smooth transonic flows to the one dimensional steady Euler system with an external force, which is subsonic at the inlet and flows out at supersonic speed after…

偏微分方程分析 · 数学 2024-03-26 Shangkun Weng , Yan Zhou

This paper investigates the large-time behavior of a buoyancy-driven fluid without thermal diffusion under Navier-slip boundary conditions in a bounded domain with Lipschitz-continuous second derivatives. After establishing improved…

偏微分方程分析 · 数学 2025-02-14 Fabian Bleitner , Elizabeth Carlson , Camilla Nobili

We obtained steady solutions to the two-dimensional Boussinesq approximation equations without mean temperature gradient. This system is referred to as free convection in this paper. Under an external flow described by the stream function…

混沌动力学 · 物理学 2009-11-07 Sadayoshi Toh , Takeshi Matsumoto

We simulate by lattice Boltzmann the steady shearing of a binary fluid mixture undergoing phase separation with full hydrodynamics in two dimensions. Contrary to some theoretical scenarios, a dynamical steady state is attained with finite…

统计力学 · 物理学 2009-11-11 P. Stansell , K. Stratford , J. -C. Desplat , R. Adhikari , M. E. Cates

Multi-component fluid flow simulations in multi-scale porous structures often involve regions that are under-resolved at practical computational resolutions. Accurately capturing the contributions from these unresolved regions is critical.…

We analyze the stability and decay of supercurrents of strongly interacting bosons on optical lattices. At the mean field level, the system undergoes an irreversible dynamic phase transition, whereby the current decays beyond a critical…

统计力学 · 物理学 2007-05-23 A. Polkovnikov , E. Altman , E. Demler , B. Halperin , M. D. Lukin

We construct two error feedback controllers for robust output tracking and disturbance rejection of a regular linear system with nonsmooth reference and disturbance signals. We show that for sufficiently smooth signals the output converges…

最优化与控制 · 数学 2023-03-01 Lassi Paunonen

We prove the existence of piecewise smooth MHD equilibria in three-dimensional toroidal domains of $\mathbf{R}^3$ where the pressure is constant on the boundary but not in the interior. The pressure is piecewise constant and the plasma…

偏微分方程分析 · 数学 2022-07-15 Alberto Enciso , Alejandro Luque , Daniel Peralta-Salas

We study stationary free boundary configurations of an ideal incompressible magnetohydrodynamic fluid possessing nested flux surfaces. In 2D simply connected domains, we prove that if the magnetic field and velocity field are never…

偏微分方程分析 · 数学 2022-06-22 Peter Constantin , Theodore D. Drivas , Daniel Ginsberg

We prove the existence of unique regular solutions of steady-state buoyancy-driven flows of viscous incompressible heat-conducting fluids in 3D open channels under mixed boundary conditions. The model takes into account the phenomena of the…

数学物理 · 物理学 2015-06-17 Michal Benes

We prove that there exists a weak solution to a system governing an unsteady flow of a viscoelastic fluid in three dimensions, for arbitrarily large time interval and data. The fluid is described by the incompressible Navier-Stokes…

偏微分方程分析 · 数学 2020-07-22 Michal Bathory , Miroslav Bulíček , Josef Málek

Filtered budgets for anelastic turbulence and a general expression of the turbulent sensible heat flux are derived for a multicomponent fluid with an arbitrary equation of state. A family of subgrid-scale closures is then found under the…

流体动力学 · 物理学 2026-01-26 Thomas Dubos

In this paper we argue that differential rotation can possibly sustain hydrodynamic turbulence in the absence of magnetic field. We explain why the non-linearities of the hydrodynamic equations (i.e. turbulent diffusion) should not be…

天体物理学 · 物理学 2009-11-10 D. T. Richard

We study the ground state of two interacting bosonic particles confined in a ring-shaped lattice potential and subjected to a synthetic magnetic flux. The system is described by the Bose-Hubbard model and solved exactly through a plane-wave…

量子气体 · 物理学 2020-05-06 Juan Polo , Piero Naldesi , Anna Minguzzi , Luigi Amico

The relevance of two-dimensional three-components (2D3C) flows goes well beyond their occurrence in nature, and a deeper understanding of their dynamics might be also helpful in order to shed further light on the dynamics of pure…

流体动力学 · 物理学 2017-11-23 L. Biferale , M. Buzzicotti , M. Linkmann