Acta mathematica scientia,Series A ›› 2019, Vol. 39 ›› Issue (1): 67-80.

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Blow-Up Criterion for Incompressible Magnetohydrodynamics Equations in Besov Space

Zhaoyang Shang()   

  1. School of Mathematical Sciences, Shanghai Jiao Tong University, Shanghai 200240
  • Received:2017-02-17 Online:2019-02-26 Published:2019-03-12
  • Supported by:
    the NSFC(11571232);the NSFC(11611130024)

Abstract:

In this paper, we study the blow-up criterion of smooth solutions to the threedimensional incompressible magnetohydrodynamic(MHD) equations in Besov space of negative regular index. We show that a smooth solution breaks down if and only if the certain norm of the velocity u blows up at the same time. Here the norm‖·‖VΘ is defined in nonhomogenous Besov space and it is weaker than‖·‖B∞, ∞α-1-norm, for 0 < α < 1.

Key words: Incompressible MHD equations, Blow-up criterion, Besov space

CLC Number: 

  • O175.2
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