Transport of momentum in full f gyrokinetics
Full f electrostatic gyrokinetic formulations employ two gyrokinetic equations, one for ions and the other for electrons, and quasineutrality to obtain the ion and electron distribution functions and the electrostatic potential. We demonstrate with several examples that the long wavelength radial el...
| Main Authors: | , |
|---|---|
| Format: | Conference item |
| Published: |
2010
|
| _version_ | 1826292957793222656 |
|---|---|
| author | Parra, F Catto, P |
| author_facet | Parra, F Catto, P |
| author_sort | Parra, F |
| collection | OXFORD |
| description | Full f electrostatic gyrokinetic formulations employ two gyrokinetic equations, one for ions and the other for electrons, and quasineutrality to obtain the ion and electron distribution functions and the electrostatic potential. We demonstrate with several examples that the long wavelength radial electric field obtained with full f approaches is extremely sensitive to errors in the ion and electron density since small deviations in density give rise to large, nonphysical deviations in the conservation of toroidal angular momentum. For typical tokamak values, a relative error of 10-7 in the ion or electron densities is enough to obtain the incorrect toroidal rotation. Based on the insights gained with the examples considered, three simple tests to check transport of toroidal angular momentum in full f simulations are proposed. © 2010 American Institute of Physics. |
| first_indexed | 2024-03-07T03:22:42Z |
| format | Conference item |
| id | oxford-uuid:b7f95bf8-e396-4563-ada7-24e9fe617691 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:22:42Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:b7f95bf8-e396-4563-ada7-24e9fe6176912022-03-27T04:52:36ZTransport of momentum in full f gyrokineticsConference itemhttp://purl.org/coar/resource_type/c_5794uuid:b7f95bf8-e396-4563-ada7-24e9fe617691Symplectic Elements at Oxford2010Parra, FCatto, PFull f electrostatic gyrokinetic formulations employ two gyrokinetic equations, one for ions and the other for electrons, and quasineutrality to obtain the ion and electron distribution functions and the electrostatic potential. We demonstrate with several examples that the long wavelength radial electric field obtained with full f approaches is extremely sensitive to errors in the ion and electron density since small deviations in density give rise to large, nonphysical deviations in the conservation of toroidal angular momentum. For typical tokamak values, a relative error of 10-7 in the ion or electron densities is enough to obtain the incorrect toroidal rotation. Based on the insights gained with the examples considered, three simple tests to check transport of toroidal angular momentum in full f simulations are proposed. © 2010 American Institute of Physics. |
| spellingShingle | Parra, F Catto, P Transport of momentum in full f gyrokinetics |
| title | Transport of momentum in full f gyrokinetics |
| title_full | Transport of momentum in full f gyrokinetics |
| title_fullStr | Transport of momentum in full f gyrokinetics |
| title_full_unstemmed | Transport of momentum in full f gyrokinetics |
| title_short | Transport of momentum in full f gyrokinetics |
| title_sort | transport of momentum in full f gyrokinetics |
| work_keys_str_mv | AT parraf transportofmomentuminfullfgyrokinetics AT cattop transportofmomentuminfullfgyrokinetics |