Streaming sand grains help define essence of a liquid

Better understanding of the laws of physics motivates the Chicago experiments. Their results have also drawn the attention of a leading industrial firm, Particulate Solid Research Inc.

In this high-speed, high-resolution video, freely falling granular streams behave similarly to water flowing from a faucet. These granular streams behave like dense, cold fluids with ultra-low surface tension (cohesion between individual molecules). "These experimental results open up new territory for which there currently is no theoretical framework," John Royer and his co-authors at the University of Chicago report in the journal Nature.

(Photo Credit: John Royer)

Heinrich Jaeger is a Professor in Physics and the James Franck Institute, University of Chicago.

(Photo Credit: University of Chicago News Office)

Source: University of Chicago