%0 Journal Article
%A Ortiz De Zárate Leira, José María
%A Sengers, Jan V.
%T Nonequilibrium velocity fluctuations and energy amplification in planar Couette flow
%D 2009
%@ 1539-3755
%U https://hdl.handle.net/20.500.14352/44402
%X In this paper we investigate intrinsic thermally excited nonequilibrium velocity fluctuations in laminar planar Couette flow. For this purpose we have complemented the solution of the stochastic Orr-Sommerfeld equation for the intensity of the fluctuations of the wall-normal velocity, presented in a previous publication, with a solution of the stochastic Squire equation for the intensity of the fluctuations of the wall-normal vorticity. We have obtained exact solutions of these equations without boundary conditions and solutions in a Galerkin approximation when appropriate boundary conditions are included. These results enable us to make a quantitative assessment of the intensity of these nonequilibrium fluctuations, as well as of the related energy amplification, which are always present, even in the absence of any externally imposed noise.
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