The CELMA model

The CELMA-model is a global drift-fluid model for modeling plasma turbulence in a linear device with constant magnetic field. The model describes the spatio-temporal evolution of the density, modified vorticity, momentum-density and current. It assumes isothermal electrons and cold ions, and does not use the Boussinesq-approximation. The derivation of the model can be found in the Derivation-part, and set of equations can be found under 5.6 The set of equations here.

The CELMA code

The CELMA-code is written using the BOUT++-framework, and contains:

• The code for simulation of the full model.
• The code for simulation of the model using the Boussinesq approximation.
• Pre- and post-processing scripts using python3.
• Verification of the code using the Method of Exact Solutions.
• Jupyter-notebooks for derivation of operators not already in the BOUT++ framework.

Add-ons to the BOUT++ framework is documented using doxygen.