 |
| Titel |
Calculations of key magnetospheric parameters using the isotropic and anisotropic SPSU global MHD code |
| VerfasserIn |
Andrey Samsonov, Evgeny Gordeev, Victor Sergeev |
| Konferenz |
EGU General Assembly 2017
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250138032
|
| Publikation (Nr.) |
 EGU/EGU2017-931.pdf |
|
|
|
|
|
| Zusammenfassung |
| As it was recently suggested (e.g., Gordeev et al., 2015), the global magnetospheric
configuration can be characterized by a set of key parameters, such as the magnetopause
distance at the subsolar point and on the terminator plane, the magnetic field in the
magnetotail lobe and the plasma sheet thermal pressure, the cross polar cap electric potential
drop and the total field-aligned current. For given solar wind conditions, the values of these
parameters can be obtained from both empirical models and global MHD simulations. We
validate the recently developed global MHD code SPSU-16 using the key magnetospheric
parameters mentioned above. The code SPSU-16 can calculate both the isotropic and
anisotropic MHD equations. In the anisotropic version, we use the modified double-adiabatic
equations in which the T⊥∕T∥ (the ratio of perpendicular to parallel thermal pressures) has
been bounded from above by the mirror and ion-cyclotron thresholds and from below by
the firehose threshold. The results of validation for the SPSU-16 code well agree
with the previously published results of other global codes. Some key parameters
coincide in the isotropic and anisotropic MHD simulations, but some are different. |
|
|
|
|
|
|