Acta mathematica scientia,Series B ›› 2020, Vol. 40 ›› Issue (6): 1700-1708.doi: 10.1007/s10473-020-0606-7

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ON VORTEX ALIGNMENT AND THE BOUNDEDNESS OF THE Lq-NORM OF VORTICITY IN INCOMPRESSIBLE VISCOUS FLUIDS

Siran LI1,2   

  1. 1. Department of Mathematics, Rice University, MS 136 P. O. Box 1892, Houston, Texas, 77251, USA;
    2. Current Address:Department of Mathematics, New York University-Shanghai, office 1146, 1555 Century Avenue, Pudong, Shanghai 200122, China
  • Received:2019-08-15 Revised:2019-12-09 Online:2020-12-25 Published:2020-12-30

Abstract: We show that the spatial -norm () of the vorticity of an incompressible viscous fluid in remains bounded uniformly in time, provided that the direction of vorticity is Hölder continuous in space, and that the space-time -norm of vorticity is finite. The Hölder index depends only on q. This serves as a variant of the classical result by Constantin-Fefferman (Direction of vorticity and the problem of global regularity for the Navier-Stokes equations, Indiana Univ. J. Math. 42 (1993), 775-789), and the related work by Grujić-Ruzmaikina (Interpolation between algebraic and geometric conditions for smoothness of the vorticity in the 3D NSE, Indiana Univ. J. Math. 53 (2004), 1073-1080).

Key words: Navier-Stokes equations, vorticity, regularity, vortex alignment, weak solution, strong solution, incompressible fluid

CLC Number: 

  • 35Q30
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