Two 1/2 inch steel balls, heated to 700 F, bracket a room temperature ball as all three are dropped into water. The two heated balls show large wakes due to the Liedenfrost effect.

Two 1/2 inch steel balls, heated to 700 F, bracket a room temperature ball as all three are dropped into water. The two heated balls show large wakes due to the Liedenfrost effect.

FlowVis@CU
2013, 2013 Spring Team Second, Flow Categories, Flow Vis Techniques, Leidenfrost, Media, Multiphase, Slow Motion, Splashes, Videos, Wakes, Jets, Shear, z Class & Assignment

By Elizabeth Crumb, Jon Horneber, Shea Zmerzlikar, Pat Cotter, Matt Bailey for Spring 2013 Team Second.
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As a 700 F steel ball is quenched in water, the left photo shows the vapor jacket surrounding the ball, and the right image shows oxidized metal flaking off due to rapid cooling and contraction.
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When a steel ball heated to 700 C is suddenly submerged in water, film boiling blasts an oxidized surface layer clean off.

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