Why this solution to the 3D periodic Navier-Stokes?

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davidpurvance
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Who can provide a physical understanding to this solution to the 3D periodic Navier-Stokes equation: http://purvanced.wordpress.com?
 

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Directionally Stationary Navier Stokes Flows

By Newton's Second Law, wouldn't incomprehensible Navier Stokes flows, devoid of any external forces, be directionally stationary? This is, flows changing in magnitude due to viscous damping, but not in direction?