Results 71 to 80 of about 2,204 (86)

Ergodicity of the finite dimensional approximation of the 3D Navier-Stokes equations forced by a degenerate noise [PDF]

open access: yesarXiv, 2002
We prove ergodicity of the finite dimensional approximations of the three dimensional Navier-Stokes equations, driven by a random force. The forcing noise acts only on a few modes and some algebraic conditions on the forced modes are found that imply the ergodicity. The convergence rate to the unique invariant measure is shown to be exponential.
arxiv  

Stochastic Navier-Stokes Equations on a Thin Spherical Domain. [PDF]

open access: yesAppl Math Optim, 2021
Brzeźniak Z, Dhariwal G, Le Gia QT.
europepmc   +1 more source

Smooth or singular solutions to the Navier--Stokes system ? [PDF]

open access: yesarXiv, 2002
The existence of singular solutions of the incompressible Navier-Stokes system with singular external forces, the existence of regular solutions for more regular forces as well as the asymptotic stability of small solutions (including stationary ones), and a pointwise loss of smoothness for solutions are proved in the same function space of ...
arxiv  

A probabilistic representation for the vorticity of a 3D viscous fluid and for general systems of parabolic equations [PDF]

open access: yesarXiv, 2003
A probabilistic representation formula for general systems of linear parabolic equations, coupled only through the zero-order term, is given. On this basis, an implicit probabilistic representation for the vorticity in a 3D viscous fluid (described by the Navier-Stokes equations) is carefully analysed, and a theorem of local existence and uniqueness is
arxiv  

Note on the finite time singularities for the 3D Navier-Stokes equations [PDF]

open access: yesarXiv, 2005
The paper has been withdrawn by the author due to a gap in Proof of Theorem 1.1.
arxiv  

Regularity of transition semigroups associated to a 3D stochastic Navier-Stokes equation [PDF]

open access: yesarXiv, 2006
A 3D stochastic Navier-Stokes equation with a suitable non degenerate additive noise is considered. The regularity in the initial conditions of every Markov transition kernel associated to the equation is studied by a simple direct approach. A by-product of the technique is the equivalence of all transition probabilities associated to every Markov ...
arxiv  

Existence of martingale and stationary suitable weak solutions for a stochastic Navier-Stokes system [PDF]

open access: yesarXiv, 2006
The existence of suitable weak solutions of 3D Navier-Stokes equations, driven by a random body force, is proved. These solutions satisfy a local balance of energy. Moreover it is proved also the existence of a statistically stationary solution.
arxiv  

A regularity criterion for the Navier-Stokes equations in terms of the pressure gradient

open access: yesOpen Mathematics, 2014
Bosia Stefano   +2 more
doaj   +1 more source

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