File electromagnetic.hxx

File electromagnetic.hxx#

Defines

ELECTROMAGNETIC_H#
struct Electromagnetic : public Component#
#include <electromagnetic.hxx>

Electromagnetic potential A||

Reinterprets all species’ parallel momentum as a combination of a parallel flow and a magnetic contribution, i.e. canonical momentum. 

m n v_{||} + Z e n A_{||}
Changes the “momentum” of each species so that after this component the momentuum of each species is just 
m n v_{||}
This component should be run after all species have set their momentum, but before the momentum is used e.g to set boundary conditions.

Calculates the electromagnetic potential A_{||} using

Laplace(Apar) - alpha_em * Apar = -Ajpar

By default outputs Apar every timestep. When diagnose = true in also saves alpha_em and Ajpar.

Public Functions

Electromagnetic(std::string name, Options &options, Solver *solver)#

Options

  • units

  • <name>

    • diagnose Saves Ajpar and alpha_em time-dependent values

virtual void transform(Options &state) override#

Inputs

  • species

    • <..> All species with charge and parallel momentum

      • charge

      • momentum

      • density

      • AA

Sets

  • species

    • <..> All species with charge and parallel momentum

      • momentum (modifies) to m n v||

      • velocity (modifies) to v||

  • fields

virtual void restartVars(Options &state) override#

Add extra fields to restart files.

virtual void outputVars(Options &state) override#

Add extra fields for output, or set attributes e.g docstrings.

Private Members

Field3D Apar#
Field3D Ajpar#
Field3D alpha_em#
BoutReal beta_em#
std::unique_ptr<Laplacian> aparSolver#
bool const_gradient#
BoutReal apar_boundary_timescale#
BoutReal last_time#
bool magnetic_flutter#

Set the magnetic flutter term?

Field3D Apar_flutter#
bool diagnose#

Output additional diagnostics?

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