{"id":406831,"date":"2022-02-17T15:14:04","date_gmt":"2022-02-17T12:14:04","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/superfluids-provide-new-insight-into-turbulence\/"},"modified":"2022-02-17T15:14:04","modified_gmt":"2022-02-17T12:14:04","slug":"superfluids-provide-new-insight-into-turbulence","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/superfluids-provide-new-insight-into-turbulence\/","title":{"rendered":"#Superfluids provide new insight into turbulence"},"content":{"rendered":"

“#Superfluids provide new insight into turbulence<\/strong>”<\/p>\n

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\n \"Superfluids
\n Credit: University of Queensland
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Eddies in an exotic liquid known as a superfluid merge to form large vortices, analogous to how cyclones form in the turbulent atmosphere.<\/p>\n

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The new research, by a team from The University of Queensland, the ARC Centre of Excellence for Engineered Quantum Systems (EQUS) and the ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) will be important for emerging technological app<\/a>lications of superfluidity, such as precision sensing.<\/p>\n

Lead author and theorist Dr. Matt Reeves said the team’s results provide experimental validation of a 70-year-old theory\u2014a model for two-dimensional vortex equilibrium by Nobel Laureate Lars Onsager.<\/p>\n

“Large, long-lived vortices like cyclones or Jupiter’s Great Red Spot often form out of turbulent fluid flows, such as the atmospheres of planets,” he said.<\/p>\n

“Onsager’s model explains the existence of these structures, but so far experiments have tended to conflict with the predictions,” he said.<\/p>\n

“A key complication is that most fluids are viscous, meaning they resist flow.<\/p>\n

“Superfluids, which have no viscosity, are therefore ideal candidates to realize Onsager’s model.”<\/p>\n

Dr. Tyler Neely, who led the experiments, said the team studied the behavior of vortices in a superfluid known as a Bose\u2013Einstein condensate, which is produced by cooling a gas of rubidium atoms to extremely cold temperatures.<\/p>\n

“We created a thin disk of the superfluid and then used lasers to inject vortices at carefully specified locations,” he said.<\/p>\n

“The vortices mixed rapidly, merging into a single large cluster in only a few seconds, much like a large cyclone forming from the turbulent atmosphere.<\/p>\n

“However, the most exciting thing was the remarkable agreement between theory and experiment\u2014the theory predicted the shape of the final giant vortex structures in the superfluid exceptionally well.<\/p>\n

“Our results suggest superfluids can be used to learn new things about turbulence, and will be crucial for the development of precision sensors based on superfluids.”<\/p>\n

This work answers some of the key outstanding questions from previous work by the team on vortex clusters, which was published in 2019 in Science<\/a><\/i>.<\/p>\n

The new research is published in Physical Review X<\/i>.<\/p>\n\n

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Engineering researchers develop new explanation for formation of vortices in 2D superfluid\n <\/p><\/div>\n

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\n More information:<\/strong>
\n Matthew T. Reeves et al, Turbulent Relaxation to Equilibrium in a Two-Dimensional Quantum Vortex Gas, Physical Review X<\/i> (2022). DOI: 10.1103\/PhysRevX.12.011031<\/a><\/p><\/div>\n
\n Provided by
\n University of Queensland
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Citation<\/strong>:
\n Superfluids provide new insight into turbulence (2022, February 17)
\n retrieved 17 February 2022
\n from https:\/\/phys.org\/news<\/a>\/2022-02-superfluids-insight-turbulence.html<\/p>\n

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