Instantaneous contours of the temperature field (top) and spanwise vorticity &omega2 (bottom) in an x-z plane. In the top image, darker color indicates hot fluid and white indicates cold fluid. Note the similar structure of the temperature and the vorticity fields. The simulation was performed using large eddy simulation (LES) with a Reynolds number of 10,000 and a Prandtl number of 1.
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