Influence of boundary conditions on the large-scale structures in turbulent plane Couette flow

Two new sets of boundary conditions have been devised with the view t o break the inflow-outflow coupling associated with periodic boundary conditio This coupling is believed to play a significant role in the formation of large-scale structures found in numerically genereated plane Couette flow. Direct numerical simulations are performed in or der to investigate the influence of the new boundary conditions on th ese large-scale structures. The effect of the boundary conditions was to shorten the streamwise length scale of the structures as well as reducing the inclination for roll cells to develop.