When the temperature is relatively high, the typical fluid exists simultaneously in the superfluid helium, and when the quantized vortex is in movement, shared friction takes place in between it and the normal-fluid. A research group led by Professor Makoto Tsubota and Specially Appointed Assistant Professor Satoshi Yui, from the Graduate School of Science and the Nambu Yoichiro Institute of Theoretical and Experimental Physics, Osaka Metropolitan University respectively in cooperation with their colleagues from Florida State University and Keio University, investigated numerically the interaction between a quantized vortex and a normal-fluid.” The subject of this study, the interaction between a quantized vortex and a normal-fluid, has actually been a great mystery since I began my research study in this field 40 years earlier,” mentioned Professor Tsubota.
A research study group led by Professor Makoto Tsubota and Specially Appointed Assistant Professor Satoshi Yui, from the Graduate School of Science and the Nambu Yoichiro Institute of Theoretical and Experimental Physics, Osaka Metropolitan University respectively in cooperation with their colleagues from Florida State University and Keio University, examined numerically the interaction in between a quantized vortex and a normal-fluid. Based upon the speculative results, scientists decided on the most constant of a number of theoretical models. They discovered that a design that represents changes in the normal-fluid and includes more theoretically precise mutual friction is the most compatible with the speculative results.
” The subject of this research study, the interaction in between a quantized vortex and a normal-fluid, has been a terrific secret considering that I started my research in this field 40 years back,” mentioned Professor Tsubota. “Computational advances have made it possible to handle this problem, and the brilliant visualization experiment by our partners at Florida State University has led to a development. As is often the case in science, subsequent advancements in innovation have made it possible to clarify, and this research study is a fine example of this.”
Their findings were published in the journal Nature Communications on May 23, 2023.
Referral: “Imaging quantized vortex rings in superfluid helium to evaluate quantum dissipation” by Yuan Tang, Wei Guo, Hiromichi Kobayashi, Satoshi Yui, Makoto Tsubota and Toshiaki Kanai, 23 May 2023, Nature Communications.DOI: 10.1038/ s41467-023-38787-w.
Visualization of quantized vortex ring above the plane (green curve), normal-fluid vortex rings (reddish half circles). Credit: Makoto Tsubota, OMU
Describing the interaction in between regular fluids and quantized vortices.
Scientists from Osaka Metropolitan University, Florida State University, and Keio University have actually debunked the interaction between a quantized vortex and a normal-fluid in liquid helium-4 at cryogenic temperature levels. Using sophisticated computation and visualization, they discovered a model considering normal-fluid modifications and accurate mutual friction to be the most fitting.
Liquid helium-4, which remains in a superfluid state at cryogenic temperatures near to absolute no (-273 ° C), has an unique vortex called a quantized vortex that originates from quantum mechanical effects. When the temperature level is fairly high, the typical fluid exists simultaneously in the superfluid helium, and when the quantized vortex is in movement, shared friction occurs in between it and the normal-fluid. Nevertheless, it is tough to discuss exactly how a quantized vortex communicates with a normal-fluid in motion. Although several theoretical models have actually been proposed, it has not been clear which model is appropriate.
