From Petrov-Einstein to Navier-Stokes

Details From Petrov-Einstein to Navier-Stokes From Petrov-Einstein to Navier-Stokes

2011-04-28

arxiv.org/abs/1104.5502v2

Physics

High Energy Physics

High Energy Physics - Theory

Added references, discussion and appendix detailing alternate boundary conditions with fixed mean curvature

Scientific paper

We consider a p+1-dimensional timelike hypersurface \Sigma_c embedded with a flat induced metric in a p+2-dimensional Einstein geometry. It is shown that imposing a Petrov type I condition on the geometry reduces the degrees of freedom in the extrinsic curvature of \Sigma_c to those of a fluid in \Sigma_c. Moreover, expanding around a limit in which the mean curvature of the embedding diverges, the leading-order Einstein constraint equations on \Sigma_c are shown to reduce to the non-linear incompressible Navier-Stokes equation for a fluid moving in \Sigma_c.

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