
Introduction The images shown in Figure 1 display a single time step of a turbulent flow simulation computed by Dr. Thomas J. R. Hughes, Professor of Aerospace Engineering, and Victor Calo at The University of Texas at Austin. This research examines how a fluid running over a flat plate suddenly becomes turbulent. The smooth flow seen at the left-hand side of the volume has low-amplitude fluctuations that interact with the smooth, laminar boundary layer of the fluid. As the energy of the fluctuations is convected downward into the boundary layer, there is a sudden explosion of the entire flow into turbulence. The left-most image of Figure 1 displays the left to right nature of the fluid as it passes over the flat plate, showing the turbulent boundary layer. The middle image shows the volumetric flow with sheet of particles inserted at designated locations to show increasing turbulent behavior. The right-most image in Figure 1 is a close up of particle sheets showing local velocity fluctuations inside the turbulent boundary layer.
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