Incompressible Navier Stokes Equations

Terry E. Moschandreou, Keith C. Afas

Published 2020-11-15Version 1

A closely related problem to The Clay Math Institute "Navier-Stokes, breakdown of smooth solutions here on an arbitrary cube subset of three dimensional space with periodic boundary conditions is examined. The incompressible Navier-Stokes Equations are presented in a new and conventionally different way here, by naturally reducing them to an operator form which is then further analyzed. It is shown that a reduction to a general 2D N-S system decoupled from a 1D non-linear partial differential equation is possible to obtain. This is executed using integration over n-dimensional compact intervals which allows decoupling. Here we extract the measure-zero points in the domain where singularities may occur and are left with a pde that exhibits finite time singularity. The operator form is considered in a physical geometric vorticity case, and a more general case. In the general case, the solution is revealed to have smooth solutions which exhibit finite-time blowup on a fine measure zero set and using the Gagliardo-Nirenberg inequalities it is shown that for any non zero measure set in the form of cube subset of 3D there is finite time blowup for the non-starred parametrized velocity in the z-direction of flow. It is proposed that for the non-dimensional quantity $\delta$ used in the reparametrization of the Navier-Stokes equations, the starred velocity in the $z^*$ direction does not blowup and this corresponds to $\delta$ approaching infinity, that is, regular defined flow at infinity.