Dual cascade and dissipation mechanisms in helical quantum turbulence

While in classical turbulence helicity depletes nonlinearity and can alter the evolution of turbulent flows, in quantum turbulence its role is not fully understood. We present numerical simulations of the free decay of a helical quantum turbulent flow using the Gross-Pitaevskii equation at high spat...

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Publicado: 2017
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v95_n5_p_ClarkdiLeoni
http://hdl.handle.net/20.500.12110/paper_24699926_v95_n5_p_ClarkdiLeoni
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_24699926_v95_n5_p_ClarkdiLeoni
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spelling paper:paper_24699926_v95_n5_p_ClarkdiLeoni2023-06-08T16:36:04Z Dual cascade and dissipation mechanisms in helical quantum turbulence While in classical turbulence helicity depletes nonlinearity and can alter the evolution of turbulent flows, in quantum turbulence its role is not fully understood. We present numerical simulations of the free decay of a helical quantum turbulent flow using the Gross-Pitaevskii equation at high spatial resolution. The evolution has remarkable similarities with classical flows, which go as far as displaying a dual transfer of incompressible kinetic energy and helicity to small scales. Spatiotemporal analysis indicates that both quantities are dissipated at small scales through nonlinear excitation of Kelvin waves and the subsequent emission of phonons. At the onset of the decay, the resulting turbulent flow displays polarized large scale structures and unpolarized patches of quiescence reminiscent of those observed in simulations of classical turbulence at very large Reynolds numbers. © 2017 American Physical Society. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v95_n5_p_ClarkdiLeoni http://hdl.handle.net/20.500.12110/paper_24699926_v95_n5_p_ClarkdiLeoni
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description While in classical turbulence helicity depletes nonlinearity and can alter the evolution of turbulent flows, in quantum turbulence its role is not fully understood. We present numerical simulations of the free decay of a helical quantum turbulent flow using the Gross-Pitaevskii equation at high spatial resolution. The evolution has remarkable similarities with classical flows, which go as far as displaying a dual transfer of incompressible kinetic energy and helicity to small scales. Spatiotemporal analysis indicates that both quantities are dissipated at small scales through nonlinear excitation of Kelvin waves and the subsequent emission of phonons. At the onset of the decay, the resulting turbulent flow displays polarized large scale structures and unpolarized patches of quiescence reminiscent of those observed in simulations of classical turbulence at very large Reynolds numbers. © 2017 American Physical Society.
title Dual cascade and dissipation mechanisms in helical quantum turbulence
spellingShingle Dual cascade and dissipation mechanisms in helical quantum turbulence
title_short Dual cascade and dissipation mechanisms in helical quantum turbulence
title_full Dual cascade and dissipation mechanisms in helical quantum turbulence
title_fullStr Dual cascade and dissipation mechanisms in helical quantum turbulence
title_full_unstemmed Dual cascade and dissipation mechanisms in helical quantum turbulence
title_sort dual cascade and dissipation mechanisms in helical quantum turbulence
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v95_n5_p_ClarkdiLeoni
http://hdl.handle.net/20.500.12110/paper_24699926_v95_n5_p_ClarkdiLeoni
_version_ 1768546136606375936

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