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In this paper we study a fractional diffusion Boussinesq model which couples the incompressible Euler equation for the velocity and a transport equation with fractional diffusion for the temperature. We prove global well-posedness results.

Analysis of PDEs · Mathematics 2015-05-13 Taoufik Hmidi , Sahbi Keraani , Frederic Rousset

We study the small data global well-posedness and time-decay rates of solutions to the Cauchy problem for 3D compressible Navier-Stokes-Allen-Cahn equations via a refined pure energy method. In particular, the optimal decay rates of the…

Analysis of PDEs · Mathematics 2021-03-23 Xiaopeng Zhao

We investigate the Cauchy problem for the thermoelastic plate system associated with Newton's law of cooling, where optimal growth ($n\leqslant 4$) or decay ($n\geqslant 5$) estimates and asymptotic profiles of solutions for large-time are…

Analysis of PDEs · Mathematics 2023-08-16 Wenhui Chen , Yan Liu

We discuss the problem of well-posedness of the compressible (barotropic) Euler system in the framework of weak solutions. The principle of maximal dissipation introduced by C.M. Dafermos is adapted and combined with the concept of…

Analysis of PDEs · Mathematics 2015-06-17 Eduard Feireisl

An important problem in the theory of compressible gas flows is to understand the singular behavior of vacuum states. The main difficulty lies in the fact that the system becomes degenerate at the vacuum boundary, where the characteristics…

Analysis of PDEs · Mathematics 2008-06-12 Juhi Jang , Nader Masmoudi

In this paper, we mainly study the Cauchy problem of the Euler-Nernst-Planck-Possion ($ENPP$) system. We first establish local well-posedness for the Cauchy problem of the $ENPP$ system in Besov spaces. Then we present a blow-up criterion…

Analysis of PDEs · Mathematics 2014-06-17 Zeng Zhang , Zhaoyang Yin

We consider the Cauchy problem of the viscous $\beta$-plane equations. We first establish the global well-posedness of the system for the initial data sufficiently small compared to the Rossby parameter. The smoothing effect of the flow is…

Analysis of PDEs · Mathematics 2026-04-22 Tomoaki Yoshizawa

This paper deals with the existence and uniqueness of solutions to kinetic equations describing alignment of self-propelled particles. The particularity of these models is that the velocity variable is not on the euclidean space but…

Analysis of PDEs · Mathematics 2023-05-10 Marc Briant , Nicolas Meunier

We study a pressureless Euler system with a nonlinear density-dependent alignment term, originating in the Cucker-Smale swarming models. The alignment term is dissipative in the sense that it tends to equilibrate the velocities. Its density…

Analysis of PDEs · Mathematics 2017-11-22 Tam Do , Alexander Kiselev , Lenya Ryzhik , Changhui Tan

The global well-posedness and stability of solutions to the three-dimensional compressible Euler equations with damping is a longstanding open problem. This problem was addressed in \cite{WY, STW} in the isentropic regime (i.e. $\gamma>1$)…

Analysis of PDEs · Mathematics 2025-02-19 Feimin Huang , Houzhi Tang , Shuxing Zhang , Weiyuan Zou

This article is concerned with the local well-posedness problem for the compressible Euler equations in gas dynamics. For this system we consider the free boundary problem which corresponds to a physical vacuum. Despite the clear physical…

Analysis of PDEs · Mathematics 2023-03-28 Mihaela Ifrim , Daniel Tataru

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…

Analysis of PDEs · Mathematics 2024-02-02 Bernard Ducomet , Šárka Nečasová , John Sebastian H. Simon

We consider the compressible Euler system with a family of nonlinear velocity alignments. The system is a nonlinear extension of the Euler-alignment system in collective dynamics. We show the asymptotic emergent phenomena of the system:…

Analysis of PDEs · Mathematics 2022-11-02 McKenzie Black , Changhui Tan

We investigate global solutions to the Euler-alignment system in $d$ dimensions with unidirectional flows and strongly singular communication protocols $\phi(x) = |x|^{-(d+\alpha)}$ for $\alpha \in (0,2)$. Our paper establishes global…

Analysis of PDEs · Mathematics 2023-08-21 Yatao Li , Qianyun Miao , Changhui Tan , Liutang Xue

The present paper is devoted to the study of the well-posedness issue for the density-dependent Euler equations in the whole space. We establish local-in-time results for the Cauchy problem pertaining to data in the Besov spaces embedded in…

Analysis of PDEs · Mathematics 2013-02-27 Raphaël Danchin

In this paper, a compressible viscous-dispersive Euler system in one space dimension in the context of quantum hydrodynamics is considered. The purpose of this study is twofold. First, it is shown that the system is locally well-posed. For…

Analysis of PDEs · Mathematics 2023-09-04 Ramón G. Plaza , Delyan Zhelyazov

In this paper we study the well-posedness of the Cauchy problem for first order hyperbolic systems with constant multiplicities and with low regularity coefficients depending just on the time variable. We consider Zygmund and log-Zygmund…

Analysis of PDEs · Mathematics 2014-04-21 Ferruccio Colombini , Daniele Del Santo , Francesco Fanelli , Guy Métivier

We study the Cauchy problem for the dissipative Benjamin-Ono equations $u_t+\H u_{xx}+|D|^\alpha u+uu_x=0$ with $0\leq\alpha\leq 2$. When $0\leq\alpha< 1$, we show the ill-posedness in $H^s(\R)$, $s\in\R$, in the sense that the flow map…

Analysis of PDEs · Mathematics 2008-02-08 Stéphane Vento

In this article, we initiate the study of the Cauchy problem for the two-dimensional relativistic Euler equations in a low-regularity setting. By introducing good variables--a rescaled velocity, logarithmic enthalpy, and an appropriately…

Analysis of PDEs · Mathematics 2025-12-19 Huali Zhang

We consider the Cauchy problem for incompressible viscoelastic fluids in the whole space $\mathbb{R}^d$ ($d=2,3$). By introducing a new decomposition via Helmholtz's projections, we first provide an alternative proof on the existence of…

Analysis of PDEs · Mathematics 2023-07-28 Xianpeng Hu , Hao Wu