Acta mathematica scientia,Series A ›› 2026, Vol. 46 ›› Issue (3): 1054-1082.

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Global Weak Solutions in a Three-Dimensional Coral Fertilization Model of Chemotaxis-Navier-Stokes Type with Flux Limitation

Boyang Cui(), Ji Liu*()   

  1. College of Sciences, Nanjing Agricultural University, Nanjing 210014
  • Received:2025-04-10 Revised:2026-01-19 Online:2026-06-26 Published:2026-06-16
  • Contact: Ji Liu E-mail:1052070109@qq.com;Liuji@njau.edu.cn
  • Supported by:
    NSFC(11223344)

Abstract:

This paper is devoted to investigating the following coral fertilization model of chemotaxis-Navier-Stokes type

$\left\{\begin{array}{ll}n_{t}+u \cdot \nabla n=\Delta n-\nabla \cdot\left(n f\left(|\nabla c|^{2}\right) \nabla c\right)-m n, & x \in \Omega, \\c_{t}+u \cdot \nabla c=\Delta c-c+m, & x \in \Omega, \\m_{t}+u \cdot \nabla m=\Delta m-m n, & x \in \Omega, \\u_{t}+(u \cdot \nabla) u=\Delta u-\nabla P+(n+m) \nabla \Phi, \nabla \cdot u=0, & x \in \Omega,\end{array}\right.$

where $\Omega \subset \mathbb{R}^3 $ is a bounded domain with smooth boundary, and $f\in C^{2}([0,+\infty))$ fulfills

$|f(\xi)| \leq K_f \cdot (\xi + 1)^{-\frac{\theta}{2}}, \xi \geq 0,$

with constants $K_f > 0$ and $\theta \in \mathbb{R}$. It is proved that if

$\theta > 0,$

then for arbitrarily appropriately regular initial data an initial-boundary value problem associated with ($*$) subject to suitably homogeneous boundary conditions admits at least one global weak solution.

Key words: chemotaxis, Navier-Stokes, flux limitation.

CLC Number: 

  • O175.29
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