Long-term memory in experiments and numerical simulations of hydrodynamic and magnetohydrodynamic turbulence
We analyze time series stemming from experiments and direct numerical simulations of hydrodynamic and magnetohydrodynamic turbulence. Simulations are done in periodic boxes, but with a volumetric forcing chosen to mimic the geometry of the flow in the experiments, the von Kármán swirling flow betwee...
| Autores principales: | , , , , , , , |
|---|---|
| Formato: | JOUR |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15393755_v89_n5_p_Mininni |
| Aporte de: |
| id |
todo:paper_15393755_v89_n5_p_Mininni |
|---|---|
| record_format |
dspace |
| spelling |
todo:paper_15393755_v89_n5_p_Mininni2023-10-03T16:22:48Z Long-term memory in experiments and numerical simulations of hydrodynamic and magnetohydrodynamic turbulence Mininni, P. Dmitruk, P. Odier, P. Pinton, J.-F. Plihon, N. Verhille, G. Volk, R. Bourgoin, M. We analyze time series stemming from experiments and direct numerical simulations of hydrodynamic and magnetohydrodynamic turbulence. Simulations are done in periodic boxes, but with a volumetric forcing chosen to mimic the geometry of the flow in the experiments, the von Kármán swirling flow between two counterrotating impellers. Parameters in the simulations are chosen to (within computational limitations) allow comparisons between the experiments and the numerical results. Conducting fluids are considered in all cases. Two different configurations are considered: a case with a weak externally imposed magnetic field and a case with self-sustained magnetic fields. Evidence of long-term memory and 1/f noise is observed in experiments and simulations, in the case with weak magnetic field associated with the hydrodynamic behavior of the shear layer in the von Kármán flow, and in the dynamo case associated with slow magnetohydrodynamic behavior of the large-scale magnetic field. © 2014 American Physical Society. Fil:Mininni, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Dmitruk, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15393755_v89_n5_p_Mininni |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We analyze time series stemming from experiments and direct numerical simulations of hydrodynamic and magnetohydrodynamic turbulence. Simulations are done in periodic boxes, but with a volumetric forcing chosen to mimic the geometry of the flow in the experiments, the von Kármán swirling flow between two counterrotating impellers. Parameters in the simulations are chosen to (within computational limitations) allow comparisons between the experiments and the numerical results. Conducting fluids are considered in all cases. Two different configurations are considered: a case with a weak externally imposed magnetic field and a case with self-sustained magnetic fields. Evidence of long-term memory and 1/f noise is observed in experiments and simulations, in the case with weak magnetic field associated with the hydrodynamic behavior of the shear layer in the von Kármán flow, and in the dynamo case associated with slow magnetohydrodynamic behavior of the large-scale magnetic field. © 2014 American Physical Society. |
| format |
JOUR |
| author |
Mininni, P. Dmitruk, P. Odier, P. Pinton, J.-F. Plihon, N. Verhille, G. Volk, R. Bourgoin, M. |
| spellingShingle |
Mininni, P. Dmitruk, P. Odier, P. Pinton, J.-F. Plihon, N. Verhille, G. Volk, R. Bourgoin, M. Long-term memory in experiments and numerical simulations of hydrodynamic and magnetohydrodynamic turbulence |
| author_facet |
Mininni, P. Dmitruk, P. Odier, P. Pinton, J.-F. Plihon, N. Verhille, G. Volk, R. Bourgoin, M. |
| author_sort |
Mininni, P. |
| title |
Long-term memory in experiments and numerical simulations of hydrodynamic and magnetohydrodynamic turbulence |
| title_short |
Long-term memory in experiments and numerical simulations of hydrodynamic and magnetohydrodynamic turbulence |
| title_full |
Long-term memory in experiments and numerical simulations of hydrodynamic and magnetohydrodynamic turbulence |
| title_fullStr |
Long-term memory in experiments and numerical simulations of hydrodynamic and magnetohydrodynamic turbulence |
| title_full_unstemmed |
Long-term memory in experiments and numerical simulations of hydrodynamic and magnetohydrodynamic turbulence |
| title_sort |
long-term memory in experiments and numerical simulations of hydrodynamic and magnetohydrodynamic turbulence |
| url |
http://hdl.handle.net/20.500.12110/paper_15393755_v89_n5_p_Mininni |
| work_keys_str_mv |
AT mininnip longtermmemoryinexperimentsandnumericalsimulationsofhydrodynamicandmagnetohydrodynamicturbulence AT dmitrukp longtermmemoryinexperimentsandnumericalsimulationsofhydrodynamicandmagnetohydrodynamicturbulence AT odierp longtermmemoryinexperimentsandnumericalsimulationsofhydrodynamicandmagnetohydrodynamicturbulence AT pintonjf longtermmemoryinexperimentsandnumericalsimulationsofhydrodynamicandmagnetohydrodynamicturbulence AT plihonn longtermmemoryinexperimentsandnumericalsimulationsofhydrodynamicandmagnetohydrodynamicturbulence AT verhilleg longtermmemoryinexperimentsandnumericalsimulationsofhydrodynamicandmagnetohydrodynamicturbulence AT volkr longtermmemoryinexperimentsandnumericalsimulationsofhydrodynamicandmagnetohydrodynamicturbulence AT bourgoinm longtermmemoryinexperimentsandnumericalsimulationsofhydrodynamicandmagnetohydrodynamicturbulence |
| _version_ |
1807323311224389632 |