# Contents * Automatic table of contents {: toc} ## Idea ## **Reynolds-averaged Navier–Stokes equations** is a technique for simplifying [[Navier-Stokes equations]] by replacing the flow field and other field with time averaged fields. In this regard, it is somewhat similar to [[large eddy simulations]]. * [Reynolds-averaged Navier–Stokes equations](http://en.wikipedia.org/wiki/Reynolds-averaged_Navier%E2%80%93Stokes_equations), Wikipedia [[!redirects RANS]] category:computational methods