Direct Numerical Simulation of an Axially Rotating Pipe Flow : (1st Report, Turbulent Statics for Low Rotation Rate)

A direct numerical simulations (DNS) of the fully developed axially rotating turbulent pipe flow was carried out. The Reynolds number, which is based on bulk velocity U_b and pipe diameter D, was set to be 5 286, while rotating rates N=u_/U_b were 0.25, 0.30 and 0.35. The Statistics obtained were the mean flow, the root-mean-square value of the fluctuating velocities, and the anisotropy invariant. It was found that the friction coefficient decreased with the rotation rate increase. Detailed distribution of the turbulent kinetic energy and Reynolds stress budgets are also presented