ess 265 simulation results: openggcm code
DESCRIPTION
ESS 265 Simulation Results: OpenGGCM code. UCLA2 Ljiljana Vasic, Lan Jian, Hanying Wei, David Galvan. Solve the MHD equations on a stretched Cartesian grid using second order explicit time integration with conservative and flux-limited spatial finite differences. - PowerPoint PPT PresentationTRANSCRIPT
ESS 265 Simulation Results:OpenGGCM code
UCLA2
Ljiljana Vasic, Lan Jian,
Hanying Wei, David Galvan
Properties and Limitations of OpenGGCM (Open Geospace General Circulation Model)
• Solve the MHD equations on a stretched Cartesian grid using second order explicit time integration with conservative and flux-limited spatial finite differences.
• Adaptable numerical grid can have from a few times 10^5 to more than 10^8 cells.
• Thus, the resolution in the MHD grid near the sub-solar magnetopause can be as small as 100 km or as large as 0.5 Re.
• A Yee grid is used to preserve the magnetic field divergence to round-off error.
• Does not include the energetic particle drift and ring current physics.
• No plasmasphere. Wave propagation through the inner magnetosphere is affected.
• Wave propagation in the inner magnetosphere is artificially slowed due to a `Boris correction' to keep time steps manageable.
• The developers do not provide any guarantee for the correctness of model results.
Initial conditions• 3D MHD Model: OpenGGCM
Simulation With Modeled Conditions Inflow Boundary Conditions: Time-Dependent Start Time: 2000/01/01 00:00 End Time: 2000/01/01 04:00 Dipole Tilt at Start in X-Z Plane: 0.0 deg. Dipole Tilt in Y-Z GSE Plane: 0.0 deg. Dipole Update With Time: noIonospheric Conductance: auroral No Corotation Velocity is Applied at The Inner Boundary.Radio Flux 10.7 cm: 150.Coordinate System for the Output: GSE Initial Solar Wind (SW) Parameters in GSM Coordinates:
• SW Density: 5. n/ccSW Temperature [Kelvin]: 100000 Kelvin X Component of SW Velocity: -400. km/sec Y Component of SW Velocity: 0. km/sec Z Component of SW Velocity: 0. km/sec IMF Bx: 0. nT IMF By: 0. nT IMF Bz: -5. nT IMF |B|: 5.00 nT IMF Clock Angle: 180.0 deg.
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