When Guinness Draught Stout is poured into a glass with sloping sides, the bubbles formed by nitrogen and CO2 coming out of solution rush upward in the middle of the glass, and the liquid recircualtes downward near the walls, carrying small bubbles along. By Alex Meyer. This was created for a course on Flow Visualization at the University of Colorado, Boulder, Get Wet Assignment, 2013. For more information, visit colorado.edu/MCEN/flowvis/

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