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We propose and study a one-dimensional $2\times 2$ hyperbolic Eulerian system with local relaxation from critical threshold phenomena perspective. The system features dynamic transition between strictly and weakly hyperbolic. For different…

Analysis of PDEs · Mathematics 2020-12-15 Manas Bhatnagar , Hailiang Liu

We here investigate a modification of the compressible barotropic Euler system with friction, involving a fuzzy nonlocal pressure term in place of the conventional one. This nonlocal term is parameterized by $\epsilon$ > 0 and formally…

Analysis of PDEs · Mathematics 2023-12-13 Raphael Danchin , Piotr Boguslaw Mucha

We study a non-local hydrodynamic system with control. First we characterize the control dynamics as a sub-optimal approximation to the optimal control problem constrained to the evolution of the pressureless Euler alignment system. We then…

Analysis of PDEs · Mathematics 2018-02-01 Giacomo Albi , Young-Pil Choi , Axel-Stefan Haeck

We study the critical thresholds for the compressible pressureless Euler equations with pairwise attractive or repulsive interaction forces and non-local alignment forces in velocity in one dimension. We provide a complete description for…

Analysis of PDEs · Mathematics 2015-05-26 José A. Carrillo , Young-Pil Choi , Eitan Tadmor , Changhui Tan

The Euler-Poisson (EP) system models the dynamics of a variety of physical processes, including charge transport, collisional plasmas, and certain cosmological wave phenomena. In this work, we establish sharp critical threshold conditions…

Analysis of PDEs · Mathematics 2025-12-18 Manas Bhatnagar , Hailiang Liu

We study the large-time behavior of Eulerian systems augmented with non-local alignment. Such systems arise as hydrodynamic descriptions of agent-based models for self-organized dynamics, e.g., Cucker-Smale and Motsch-Tadmor models…

Analysis of PDEs · Mathematics 2015-06-19 Eitan Tadmor , Changhui Tan

We study the 1D pressureless Euler-Poisson equations with variable background states and nonlocal velocity alignment. Our main focus is the phenomenon of critical thresholds, where subcritical initial data lead to global regularity, while…

Analysis of PDEs · Mathematics 2025-05-07 Kunhui Luan , Changhui Tan , Qiyu Wu

We analyse the one-dimensional pressureless Euler-Poisson equations with a linear damping and non-local interaction forces. These equations are relevant for modelling collective behavior in mathematical biology. We provide a sharp threshold…

Analysis of PDEs · Mathematics 2016-04-19 José A. Carrillo , Young-Pil Choi , Ewelina Zatorska

In this paper, we study the Cauchy problem of the compressible Euler system with strongly singular velocity alignment. We prove the existence and uniqueness of global solutions in critical Besov spaces to the considered system with small…

Analysis of PDEs · Mathematics 2022-07-07 Xiang Bai , Qianyun Miao , Changhui Tan , Liutang Xue

We investigate a system of nonlocal transport equations in one spatial dimension. The system can be regarded as a model for the 3D Euler equations in the hyperbolic flow scenario. We construct blowup solutions with control up to the blowup…

Analysis of PDEs · Mathematics 2016-10-31 Vu Hoang , Maria Radosz

We investigate the critical threshold phenomena in a large class of one dimensional pressureless Euler--Poisson (EP) equations, with non-vanishing background states. First, we establish local-in-time well-posedness in proper regularity…

Analysis of PDEs · Mathematics 2024-02-21 Young-Pil Choi , Dong-ha Kim , Dowan Koo , Eitan Tadmor

We study two relaxation problems in the class of partially dissipative hyperbolic systems: the compressible Euler system and the compressible Euler-Maxwell system. In classical Sobolev spaces, we derive a global convergence rate of…

Analysis of PDEs · Mathematics 2025-10-02 Timothée Crin-Barat , Yue-Jun Peng , Ling-Yun Shou

We consider solutions to nonlinear hyperbolic systems of balance laws with stiff relaxation and formally derive a parabolic-type effective system describing the late-time asymptotics of these solutions. We show that many examples from…

Analysis of PDEs · Mathematics 2011-06-01 Philippe G. LeFloch

In this paper, we consider a new nonlocal approximation to the linear Stokes system with periodic boundary conditions in two and three dimensional spaces . A relaxation term is added to the equation of nonlocal divergence free equation,…

Analysis of PDEs · Mathematics 2024-03-13 Yajie Zhang , Qiang Du , Zuoqiang Shi

We consider several modifications of the Euler system of fluid dynamics including its pressureless variant driven by non-local interaction repulsive-attractive and alignment forces in the space dimension $N=2,3$. These models arise in the…

Analysis of PDEs · Mathematics 2015-12-11 José A. Carrillo , Eduard Feireisl , Piotr Gwiazda , Agnieszka Świerczewska-Gwiazda

We establish the local uniqueness of steady transonic shock solutions with spherical symmetry for the three-dimensional full Euler equations. These transonic shock-fronts are important for understanding transonic shock phenomena in…

Analysis of PDEs · Mathematics 2011-12-09 Gui-Qiang G. Chen , Hairong Yuan

A generalization of the Euler's elastic problem, i.e., finding a stationary configuration (planar elastica) of the Bernoulli's thin ideal elastic rod with boundary conditions defined through fixed endpoints and/or tangents at the endpoints,…

Classical Physics · Physics 2025-12-23 Vasyl Kovalchuk , Ewa Eliza Rożko , Barbara Gołubowska

We show how to obtain general nonlinear aggregation-diffusion models, including Keller-Segel type models with nonlinear diffusions, as relaxations from nonlocal compressible Euler-type hydrodynamic systems via the relative entropy method.…

Analysis of PDEs · Mathematics 2019-10-29 José A. Carrillo , Yingping Peng , Aneta Wróblewska-Kamińska

Here we investigate global strong solutions for a class of partially dissipative hyperbolic systems in the framework of critical homogeneous Besov spaces. Our primary goal is to extend the analysis of our previous paper [10] to a functional…

Analysis of PDEs · Mathematics 2022-01-19 Timothée Crin-Barat , Raphaël Danchin

The Euler-Navier-Stokes (E-NS) system arises as a macroscopic description of kinetic-fluid interactions, derived from the local-Maxwellian closure of the Vlasov-Fokker-Planck-Navier-Stokes flow. In this paper, we investigate the singular…

Analysis of PDEs · Mathematics 2025-12-11 Mingwen Fei , Ling-Yun Shou , Houzhi Tang
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