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Global solvability and eventual smoothness in a chemotaxis-fluid system with weak logistic-type degradation

    https://doi.org/10.1142/S0218202520400102Cited by:18 (Source: Crossref)
    This article is part of the issue:

    We consider the coupled chemotaxis–Navier–Stokes system with logistic source term

    {nt+un=Δn(nc)+rnμnα,ct+uc=Δcnc,ut+(u)u=Δu+P+nΦ,u=0
    in a bounded, smooth domain Ω3, where ΦW2,(Ω) and where r0, μ>0 and 1<α<2 are given parameters. Although the degradation here is weaker than the usual quadratic case, it is proved that for any sufficiently regular initial data, the initial-value problem for this system under no-flux boundary conditions for n and c and homogeneous Dirichlet boundary condition for u possesses at least one globally defined weak solution. And this weak solution becomes smooth after some waiting time provided 65α<2.

    Communicated by N. Bellomo, Y. Tao and M. Winkler

    AMSC: 92C17, 35Q30, 35K55, 35B65, 35B40