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We present a systematic theory of dissipation in finite Fermi systems like nuclei and metallic clusters. This theory is based on the application of semiclassical methods and random matrix theory to linear response of many-body systems. The…

核理论 · 物理学 2009-10-31 Sudhir R. Jain

We study a moisture model for warm clouds that has been used by Klein and Majda as a basis for multiscale asymptotic expansions for deep convective phenomena. These moisture balance equations correspond to a bulk microphysics closure in the…

偏微分方程分析 · 数学 2017-10-11 Sabine Hittmeir , Rupert Klein , Jinkai Li , Edriss S. Titi

We investigate a non-isothermal diffuse-interface model that describes the dynamics of two-phase incompressible flows with thermo-induced Marangoni effect. The governing PDE system consists of the Navier--Stokes equations coupled with…

偏微分方程分析 · 数学 2023-07-28 Hao Wu

In this paper, we consider the two-dimensional (2D) incompressible Boussinesq system with fractional Laplacian dissipation and thermal diffusion. Based on the previous works and some new observations, we show that the condition $1-\alpha…

偏微分方程分析 · 数学 2015-10-15 Zhuan Ye

We briefly review the Thomas-Fermi statistical model of atoms in the classical non-relativistic formulation and in the generalised finite-nucleus relativistic formulation. We then discuss the classical generalisation of the model to finite…

天体物理学 · 物理学 2017-08-23 G. Bertone , R. Ruffini

Dissipative particle dynamics (DPD) does not conserve energy and this precludes its use in the study of thermal processes in complex fluids. We present here a generalization of DPD that incorporates an internal energy and a temperature…

统计力学 · 物理学 2016-08-15 Pep Español

We present a class of new explicit and stable numerical algorithms to solve the spatially discretized linear heat or diffusion equation. After discretizing the space and the time variables like conventional finite difference methods, we do…

数值分析 · 数学 2021-04-27 Endre Kovács

The equations of fluid motions are considered in the case of internal energy depending on mass density, volume entropy and their spatial derivatives. The model corresponds to domains with large density gradients in which the temperature is…

流体动力学 · 物理学 2017-06-27 Henri Gouin

We consider the Cauchy problem for a damped Euler-Maxwell system with no ionic background. For smooth enough data satisfying suitable so-called dispersive conditions, we establish the global in time existence and uniqueness of a strong…

偏微分方程分析 · 数学 2024-02-02 Bernard Ducomet , Šárka Nečasová , John Sebastian H. Simon

In this paper, we prove the global existence of general small solutions to compressible viscoelastic system. We remove the "initial state" assumption ($\tilde \rho_0 \det F_0 =1$) and the "div-curl" structure assumption compared with…

偏微分方程分析 · 数学 2022-01-05 Yi Zhu

In this paper we prove global existence of weak solutions, their regularization, and relaxation for large data for a broad class of Fokker-Planck-Alignment models which appear in collective dynamics. The main feature of these results, as…

偏微分方程分析 · 数学 2026-02-19 R. Shvydkoy

We consider a fermionic quantum system exchanging particles with an environment at a fixed temperature and study its reduced evolution by means of a Redfield-I equation with time-dependent (non-Markovian) coefficients. We find that the…

介观与纳米尺度物理 · 物理学 2025-02-04 Lukas Litzba , Eric Kleinherbers , Jürgen König , Ralf Schützhold , Nikodem Szpak

We consider quantum nonlinear systems with dissipation described within the Caldeira-Leggett model, i.e., by a nonlocal action in the path integral for the density matrix. Approximate classical-like formulas are derived in order to evaluate…

统计力学 · 物理学 2007-05-23 A. Cuccoli , A. Fubini , A. Rossi , V. Tognetti , R. Vaia

In this paper, an improved quasi-particle model is presented. Unlike the previous approach of establishing quasi-particle model, we introduce a classical background field (it is allowed to depend on the temperature) to deal with the…

高能物理 - 唯象学 · 物理学 2015-06-04 Jing Cao , Yu Jiang , Wei-min Sun , Hong-shi Zong

We are concerned with the global existence of classical solutions to the barotropic compressible Navier-Stokes equations with slip boundary condition in a three-dimensional (3D) exterior domain. We demonstrate that the classical solutions…

偏微分方程分析 · 数学 2021-12-13 Guocai Cai , Jing Li , Boqiang Lü

In this paper, we consider the initial-boundary value problem of the 3D primitive equations for oceanic and atmospheric dynamics with only horizontal diffusion in the temperature equation. Global well-posedness of strong solutions are…

偏微分方程分析 · 数学 2014-01-08 Chongsheng Cao , Jinkai Li , Edriss S. Titi

Thermal tides are atmospheric tides caused by variations in day-night insolation, similar to gravitational tides but with key differences. While both result in delayed mass redistribution, energy dissipation, and angular momentum exchanges…

地球与行星天体物理 · 物理学 2024-10-22 Pierre Auclair-Desrotour , Mohammad Farhat , Gwenaël Boué , Russell Deitrick , Jacques Laskar

This paper is concerned with the well-posedness analysis of the Hartree-Fock system modeling the time evolution of a quantum system comprised of fermions. We consider quantum states with finite mass and finite kinetic energy, and the…

数学物理 · 物理学 2007-05-23 A. Arnold , R. Bosi , S. Jeschke , E. Zorn

A type-I model of non-isothermal multicomponent systems of gases describing mass diffusive and heat conductive phenomena is presented. The derivation of the model and a convergence result among thermomechanical theories in the smooth regime…

偏微分方程分析 · 数学 2023-01-24 Stefanos Georgiadis , Ansgar Jüngel , Athanasios Tzavaras

It is well known, by now, that the three-dimensional non-viscous planetary geostrophic model, with vertical hydrostatic balance and horizontal Rayleigh friction, coupled to the heat diffusion and transport, is mathematically ill-posed. This…

偏微分方程分析 · 数学 2010-12-30 Chongsheng Cao , Edriss S. Titi