From small-scale dynamo to isotropic MHD turbulence
We consider the problem of incompressible, forced, nonhelical, homogeneous, isotropic MHD turbulence with no mean magnetic field. This problem is essentially different from the case with externally imposed uniform mean field. There is no scale-by-scale equipartition between magnetic and kinetic ener...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2004
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| _version_ | 1797069632230653952 |
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| author | Schekochihin, A Cowley, S Taylor, S Maron, J McWilliams, J |
| author_facet | Schekochihin, A Cowley, S Taylor, S Maron, J McWilliams, J |
| author_sort | Schekochihin, A |
| collection | OXFORD |
| description | We consider the problem of incompressible, forced, nonhelical, homogeneous, isotropic MHD turbulence with no mean magnetic field. This problem is essentially different from the case with externally imposed uniform mean field. There is no scale-by-scale equipartition between magnetic and kinetic energies as would be the case for the Alfvén-wave turbulence. The isotropic MHD turbulence is the end state of the turbulent dynamo which generates folded fields with small-scale direction reversals. We propose that the statistics seen in numerical simulations of isotropic MHD turbulence could be explained as a superposition of these folded fields and Alfvén-like waves that propagate along the folds. |
| first_indexed | 2024-03-06T22:27:20Z |
| format | Journal article |
| id | oxford-uuid:57178fb3-93e1-458c-88fe-1f5b9926deac |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:27:20Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:57178fb3-93e1-458c-88fe-1f5b9926deac2022-03-26T16:54:33ZFrom small-scale dynamo to isotropic MHD turbulenceJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:57178fb3-93e1-458c-88fe-1f5b9926deacEnglishSymplectic Elements at Oxford2004Schekochihin, ACowley, STaylor, SMaron, JMcWilliams, JWe consider the problem of incompressible, forced, nonhelical, homogeneous, isotropic MHD turbulence with no mean magnetic field. This problem is essentially different from the case with externally imposed uniform mean field. There is no scale-by-scale equipartition between magnetic and kinetic energies as would be the case for the Alfvén-wave turbulence. The isotropic MHD turbulence is the end state of the turbulent dynamo which generates folded fields with small-scale direction reversals. We propose that the statistics seen in numerical simulations of isotropic MHD turbulence could be explained as a superposition of these folded fields and Alfvén-like waves that propagate along the folds. |
| spellingShingle | Schekochihin, A Cowley, S Taylor, S Maron, J McWilliams, J From small-scale dynamo to isotropic MHD turbulence |
| title | From small-scale dynamo to isotropic MHD turbulence |
| title_full | From small-scale dynamo to isotropic MHD turbulence |
| title_fullStr | From small-scale dynamo to isotropic MHD turbulence |
| title_full_unstemmed | From small-scale dynamo to isotropic MHD turbulence |
| title_short | From small-scale dynamo to isotropic MHD turbulence |
| title_sort | from small scale dynamo to isotropic mhd turbulence |
| work_keys_str_mv | AT schekochihina fromsmallscaledynamotoisotropicmhdturbulence AT cowleys fromsmallscaledynamotoisotropicmhdturbulence AT taylors fromsmallscaledynamotoisotropicmhdturbulence AT maronj fromsmallscaledynamotoisotropicmhdturbulence AT mcwilliamsj fromsmallscaledynamotoisotropicmhdturbulence |