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We consider the Cauchy problem for the Keller-Segel system of consumption type coupled with the incompressible Euler equations in $\mathbb{R}^2$. This coupled system describes a biological phenomenon in which aerobic bacteria living in…

Analysis of PDEs · Mathematics 2024-01-18 Jungkyoung Na

Several fluid systems are characterised by time reversal and parity breaking. Examples of such phenomena arise both in quantum and classical hydrodynamics. In these situations, the viscosity tensor, often dubbed ``odd viscosity'', becomes…

Analysis of PDEs · Mathematics 2022-11-30 Francesco Fanelli , Rafael Granero-Belinchón , Stefano Scrobogna

A class of parabolic-parabolic Keller-Segel systems with degenerate diffusion and volume filling is studied in a bounded domain subject to no-flux boundary conditions. The equations are derived from a multiphase fluid model. The interplay…

Analysis of PDEs · Mathematics 2026-05-21 Noah Geltner , Ansgar Jüngel , Mingyue Zhang

We study the global strong solutions to a 3-dimensional parabolic-hyperbolic Keller-Segel model with initial data close to a stable equilibrium with perturbations belonging to $L^2(\mathbb R^3)\times H^1(\mathbb{R}^3)$. We obtain global…

Analysis of PDEs · Mathematics 2012-11-01 Chao Deng , Tong Li

We consider a Keller-Segel model coupled to the incompressible Navier-Stokes equations in spatial dimensions two and three. We establish the local existence of regular solutions and present some blow-up criteria for both cases that…

Analysis of PDEs · Mathematics 2013-04-30 Myeongju Chae , Kyungkeun Kang , Jihoon Lee

We are concerned with the well-posedness of the density-dependent incompressible viscoelastic fluid system. By Schauder-Tychonoff fixed point argument, when $\|{1}/{\rho_0}-1\|_{\dot{B}_{p,1}^{{N}/{p}}}$ is small, local well-posedness is…

Analysis of PDEs · Mathematics 2011-05-25 Huazhao Xie , Yunxia Fu

In this paper, we shall study the parabolic-elliptic Keller-Segel system on the Poincar{\'e} disk model of the 2D-hyperbolic space. We shall investigate how the negative curvature of this Riemannian manifold influences the solutions of this…

Analysis of PDEs · Mathematics 2018-10-22 Patrick Maheux , Vittoria Pierfelice

We study the Kolomogorov two-equation model of turbulence in one space dimension. Two are the main results of the paper. First of all, we establish a local well-posedness theory in Sobolev spaces even in the case of vanishing mean turbulent…

Analysis of PDEs · Mathematics 2023-10-17 Francesco Fanelli , Rafael Granero-Belinchón

This paper is dedicated to the study of viscous compressible barotropic fluids in dimension $N\geq2$. We address the question of well-posedness for {\it large} data having critical Besov regularity. Our result improve the analysis of R.…

Analysis of PDEs · Mathematics 2009-04-09 Boris Haspot

This paper deals with a hyperbolic Keller-Segel system of consumption type with the logarithmic sensitivity \begin{equation*} \partial_{t} \rho = - \chi\nabla \cdot \left (\rho \nabla \log c\right),\quad \partial_{t} c = - \mu c\rho\quad…

Analysis of PDEs · Mathematics 2024-03-11 Jungkyoung Na

We consider the Keller-Segel model for chemotaxis with a nonlinear diffusion coefficent and a singular sensitivity function. We show the existence of travelling waves for wave speeds above a critical value, and establish local…

Analysis of PDEs · Mathematics 2012-02-20 Martin Meyries

We consider a Keller-Segel model with non-linear porous medium type diffusion and non-local attractive power law interaction, focusing on potentials that are less singular than Newtonian interaction. Here, the nonlinear diffusion is chosen…

Analysis of PDEs · Mathematics 2024-12-18 Shen Bian , Yichen Zou

In this work we consider the Keller-Segel system coupled with Navier-Stokes equations in $\mathbb{R}^{N}$ for $N\geq2$. We prove the global well-posedness with small initial data in Besov-Morrey spaces. Our initial data class extends…

Analysis of PDEs · Mathematics 2019-07-24 Lucas C. F. Ferreira , Monisse Postigo

This paper is devoted to the analysis of the classical Keller-Segel system over $\mathbb{R}^d$, $d\geq 3$. We describe as much as possible the dynamics of the system characterized by various criteria, both in the parabolic-elliptic case and…

Analysis of PDEs · Mathematics 2010-03-23 Vincent Calvez , Lucilla Corrias , Mohammed Abderrahman Ebde

We investigate the one-dimensional Keller-Segel model where the diffusion is replaced by a non-local operator, namely the fractional diffusion with exponent $0<\alpha\leq 2$. We prove some features related to the classical two-dimensional…

Analysis of PDEs · Mathematics 2015-05-13 Nikolaos Bournaveas , Vincent Calvez

A Keller-Segel model describes macroscopic dynamics of bacterial colonies and biological cells. Bacteria secret chemical which attracts other bacteria so that they move towards chemical gradient creating nonlocal attraction between…

Pattern Formation and Solitons · Physics 2010-05-18 Pavel M. Lushnikov

We study the well-posedness of the Hele-Shaw-Cahn-Hilliard system modeling binary fluid flow in porous media with arbitrary viscosity contrast but matched density between the components. For initial data in $H^s, s>\frac{d}{2}+1$, the…

Analysis of PDEs · Mathematics 2010-12-15 Xiaoming Wang , Zhifei Zhang

We study a doubly parabolic Keller-Segel system in one spatial dimension, with diffusions given by fractional laplacians. We obtain several local and global well-posedness results for the subcritical and critical cases (for the latter we…

Analysis of PDEs · Mathematics 2016-11-15 Jan Burczak , Rafael Granero-Belinchón

The Keller-Segel-Navier-Stokes system governs chemotaxis in liquid environments. This system is to be solved for the organism and chemoattractant densities and for the fluid velocity and pressure. It is known that if the total initial cell…

Numerical Analysis · Mathematics 2023-02-02 Jesús Bonilla , Juan Vicente Gutiérrez-Santacreu

In this paper we obtain new well-possedness results concerning a linear inhomogenous Stokes-like system. These results are used to establish local well-posedness in the critical spaces for initial density $\rho_{0}$ and velocity $u_{0}$…

Analysis of PDEs · Mathematics 2017-03-08 Cosmin Burtea
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