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Demonstrating the power of electricity in the “Physics with a Bang!” holiday lecture.

Effect of surface roughness and air pressure on splashing Sidney R. Nagel, University of Chicago, DMR 0652269.

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Demonstrating the power of electricity in the “Physics with a Bang!” holiday lecture.

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  1. Effect of surface roughness and air pressure on splashingSidney R. Nagel, University of Chicago, DMR 0652269 We found that substrate roughness and surrounding gas pressure control the splashing of a liquid drop hitting a dry solid surface: prompt splashing is due to surface roughness and corona splashing is due to instabilities produced by the surrounding gas. Splashing on rough substrate at low (top) and atmospheric pressure (bottom). The left and right columns are 0.2ms and 0.5ms from the time of impact. Note that at low pressure, there is an initial small (prompt) splash that disappears at later times. At atmospheric pressure, the (coronal) splash persists to late times.

  2. Effect of surface roughness and air pressure on splashingSidney R. Nagel (University of Chicago), DMR 0652269 The PI and Heinrich Jaeger held a public holiday lecture for “children of alll ages”. This Physics with a Bang! lecture was written up in the NY Times website blog Freakonomics. The PI also ran the Physics Department REU program for Women and Underrepresented Minorities for the past 5 years. Demonstrating the power of electricity in the “Physics with a Bang!” holiday lecture.

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