Long time existence of regular solutions to 3d Navier-Stokes equations coupled with the heat convection

Details Long time existence of regular solutions to 3d Navier-Stokes equations coupled with the heat convection Long time existence of regular solutions to 3d Navier-Stokes equations coupled with the heat convection

2011-03-21

arxiv.org/abs/1103.4027v1

Mathematics

Analysis of PDEs

Scientific paper

We prove long time existence of regular solutions to the Navier-Stokes equations coupled with the heat equation. We consider the system in non-axially symmetric cylinder with the slip boundary conditions for the Navier-Stokes equations and the Neumann condition for the heat equation. The long time existence is possible because we assumed that derivatives with respect to the variable along the axis of the cylinder of the initial velocity, initial temperature and the external force in $L_2$ norms are sufficiently small. We proved the existence of such solutions that velocity and temperature belong to $W_\sigma^{2,1}(\Omega\times(0,T))$, where $\sigma>{5\over3}$. The existence is proved by the Leray-Schauder fixed point theorem.

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