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arxiv: 1501.02085 · v3 · pith:2UGFYYSEnew · submitted 2015-01-09 · 🧮 math-ph · math.MP

New look at the Navier-Stokes equation

classification 🧮 math-ph math.MP
keywords equationregularapproximationssolutionsfractionalnavier-stokespowerabove
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We propose a new way of looking at the Navier-Stokes equation (N-S) in dimensions two and three. We consider its regular approximations in which the -P Delta operator is replaced with the fractional power. The 3-D N-S equation is super-critical with respect to the standard L2 a priori estimates; the regular approximating problem in 3-D should contain fractional power with s > 5/4. Using Dan Henry's semigroup approach we construct regular solutions to such approximations. The solutions are unique, smooth and regularized through the equation in time. Solution to 2-D and 3-D N-S equations are obtained next as a limit of the regular solutions of the above approximations.

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