Emergent Universal Drag Law in a Model of Superflow
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866908482803859456 |
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| author | Christenhusz, Maarten T. M. Safavi-Naini, Arghavan Rubinsztein-Dunlop, Halina Neely, Tyler W. Reeves, Matthew T. |
| author_facet | Christenhusz, Maarten T. M. Safavi-Naini, Arghavan Rubinsztein-Dunlop, Halina Neely, Tyler W. Reeves, Matthew T. |
| contents | Despite the fundamentally different dissipation mechanisms, many laws and phenomena of classical turbulence equivalently manifest in quantum turbulence. The Reynolds law of dynamical similarity states that two objects of same geometry across different length scales are hydrodynamically equivalent under the same Reynolds number, leading to a universal drag coefficient law. In this work we confirm the existence of a universal drag law in a superfluid wake, facilitated by the nucleation of quantized vortices. We numerically study superfluid flow across a range of Reynolds numbers for the paradigmatic classical hard-wall and the Gaussian obstacle, popular in experimental quantum hydrodynamics. In addition, we provide a feasible method for measuring superfluid drag forces in an experimental environment using control volumes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_14049 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Emergent Universal Drag Law in a Model of Superflow Christenhusz, Maarten T. M. Safavi-Naini, Arghavan Rubinsztein-Dunlop, Halina Neely, Tyler W. Reeves, Matthew T. Quantum Gases Fluid Dynamics Despite the fundamentally different dissipation mechanisms, many laws and phenomena of classical turbulence equivalently manifest in quantum turbulence. The Reynolds law of dynamical similarity states that two objects of same geometry across different length scales are hydrodynamically equivalent under the same Reynolds number, leading to a universal drag coefficient law. In this work we confirm the existence of a universal drag law in a superfluid wake, facilitated by the nucleation of quantized vortices. We numerically study superfluid flow across a range of Reynolds numbers for the paradigmatic classical hard-wall and the Gaussian obstacle, popular in experimental quantum hydrodynamics. In addition, we provide a feasible method for measuring superfluid drag forces in an experimental environment using control volumes. |
| title | Emergent Universal Drag Law in a Model of Superflow |
| topic | Quantum Gases Fluid Dynamics |
| url | https://arxiv.org/abs/2406.14049 |