Intrinsic rotation with gyrokinetic models
The generation of intrinsic rotation by turbulence and neoclassical effects in tokamaks is considered. To obtain the complex dependences observed in experiments, it is necessary to have a model of the radial flux of momentum that redistributes the momentum within the tokamak in the absence of a pree...
| Main Authors: | , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2012
|
| _version_ | 1826272837034311680 |
|---|---|
| author | Parra, F Barnes, M Calvo, I Catto, P |
| author_facet | Parra, F Barnes, M Calvo, I Catto, P |
| author_sort | Parra, F |
| collection | OXFORD |
| description | The generation of intrinsic rotation by turbulence and neoclassical effects in tokamaks is considered. To obtain the complex dependences observed in experiments, it is necessary to have a model of the radial flux of momentum that redistributes the momentum within the tokamak in the absence of a preexisting velocity. When the lowest order gyrokinetic formulation is used, a symmetry of the model precludes this possibility, making small effects in the gyroradius over scale length expansion necessary. These effects that are usually small become important for momentum transport because the symmetry of the lowest order gyrokinetic formulation leads to the cancellation of the lowest order momentum flux. The accuracy to which the gyrokinetic equation needs to be obtained to retain all the physically relevant effects is discussed. |
| first_indexed | 2024-03-06T22:18:53Z |
| format | Journal article |
| id | oxford-uuid:545ad31a-7ce9-4541-ad89-b6f6cd72d5ea |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:18:53Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:545ad31a-7ce9-4541-ad89-b6f6cd72d5ea2022-03-26T16:37:13ZIntrinsic rotation with gyrokinetic modelsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:545ad31a-7ce9-4541-ad89-b6f6cd72d5eaEnglishSymplectic Elements at Oxford2012Parra, FBarnes, MCalvo, ICatto, PThe generation of intrinsic rotation by turbulence and neoclassical effects in tokamaks is considered. To obtain the complex dependences observed in experiments, it is necessary to have a model of the radial flux of momentum that redistributes the momentum within the tokamak in the absence of a preexisting velocity. When the lowest order gyrokinetic formulation is used, a symmetry of the model precludes this possibility, making small effects in the gyroradius over scale length expansion necessary. These effects that are usually small become important for momentum transport because the symmetry of the lowest order gyrokinetic formulation leads to the cancellation of the lowest order momentum flux. The accuracy to which the gyrokinetic equation needs to be obtained to retain all the physically relevant effects is discussed. |
| spellingShingle | Parra, F Barnes, M Calvo, I Catto, P Intrinsic rotation with gyrokinetic models |
| title | Intrinsic rotation with gyrokinetic models |
| title_full | Intrinsic rotation with gyrokinetic models |
| title_fullStr | Intrinsic rotation with gyrokinetic models |
| title_full_unstemmed | Intrinsic rotation with gyrokinetic models |
| title_short | Intrinsic rotation with gyrokinetic models |
| title_sort | intrinsic rotation with gyrokinetic models |
| work_keys_str_mv | AT parraf intrinsicrotationwithgyrokineticmodels AT barnesm intrinsicrotationwithgyrokineticmodels AT calvoi intrinsicrotationwithgyrokineticmodels AT cattop intrinsicrotationwithgyrokineticmodels |