Swarming: hydrodynamic alignment with pressure

E Tadmor - Bulletin of the American Mathematical Society, 2023 - ams.org
We study the swarming behavior of hydrodynamic alignment. Alignment reflects steering
toward a weighted average heading. We consider the class of so-called $ p $-alignment …

Sticky particle Cucker–Smale dynamics and the entropic selection principle for the 1D Euler-alignment system

TM Leslie, C Tan - Communications in Partial Differential …, 2023 - Taylor & Francis
We develop a global wellposedness theory for weak solutions to the 1D Euler-alignment
system with measure-valued density, bounded velocity, and locally integrable …

Existence of radial global smooth solutions to the pressureless Euler–Poisson equations with quadratic confinement

JA Carrillo, R Shu - Archive for Rational Mechanics and Analysis, 2023 - Springer
We consider the pressureless Euler–Poisson equations with quadratic confinement. For
spatial dimension d≥ 2, d≠ 4, we give a necessary and sufficient condition for the existence …

Inevitable monokineticity of strongly singular alignment

M Fabisiak, J Peszek - Mathematische Annalen, 2024 - Springer
We prove that certain types of measure-valued map**s are monokinetic ie the distribution
of velocity is concentrated in a Dirac mass. These include weak measure-valued solutions to …

Eulerian dynamics in multidimensions with radial symmetry

C Tan - SIAM Journal on Mathematical Analysis, 2021 - SIAM
We study the global wellposedness of pressureless Eulerian dynamics in multidimensions,
with radially symmetric data. Compared with the one-dimensional system, a major difference …

Singularity formation for a fluid mechanics model with nonlocal velocity

C Tan - arxiv preprint arxiv:1708.09360, 2017 - arxiv.org
We study a 1D fluid mechanics model with nonlocal velocity. The equation can be viewed as
a fractional porous medium flow, a 1D model of the quasi-geostrophic equation, and also a …

From BGK-alignment model to the pressured Euler-alignment system with singular communication weights

YP Choi, BH Hwang - Journal of Differential Equations, 2024 - Elsevier
This paper is devoted to a rigorous derivation of the isentropic Euler-alignment system with
singular communication weights ϕ α (x)=| x|− α for some α> 0. We consider a kinetic BGK …

On the global classical solution to compressible Euler system with singular velocity alignment

L Chen, C Tan, L Tong - arxiv preprint arxiv:2007.08356, 2020 - arxiv.org
We consider a compressible Euler system with singular velocity alignment, known as the
Euler-alignment system, describing the flocking behaviors of large animal groups. We …

A sharp critical threshold for a traffic flow model with look-ahead dynamics

Y Lee, C Tan - arxiv preprint arxiv:1905.05090, 2019 - arxiv.org
arxiv:1905.05090v1 [math.AP] 13 May 2019 Page 1 arxiv:1905.05090v1 [math.AP] 13 May
2019 A SHARP CRITICAL THRESHOLD FOR A TRAFFIC FLOW MODEL WITH LOOK-AHEAD …

Global well-posedness and refined regularity criterion for the uni-directional Euler-alignment system

Y Li, Q Miao, C Tan, L Xue - … Mathematics Research Notices, 2024 - academic.oup.com
We investigate global solutions to the Euler-alignment system in dimensions with
unidirectional flows and strongly singular communication protocols for. Our paper …