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

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The discussion centers on the physical understanding of directionally stationary flows in the context of the 3D periodic Navier-Stokes equation. It raises the question of whether such flows, influenced solely by viscous damping and lacking external forces, would remain constant in direction while changing in magnitude. A clarification is made regarding terminology, suggesting the correct term should be 'incompressible' rather than 'incomprehensible.' The conversation highlights the complexities of fluid dynamics and the implications of Newton's Second Law on the behavior of these flows. Overall, the dialogue emphasizes the need for clarity in discussing fluid mechanics concepts.
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?
 
I think you mean 'incompressible' flows, rather than 'incomprehensible' flows.
 
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