File braginskii_electron_viscosity.hxx

Defines

BRAGINSKII_ELECTRON_VISCOSITY_H

struct BraginskiiElectronViscosity : public Component

#include <braginskii_electron_viscosity.hxx>

Electron viscosity

Adds Braginskii parallel electron viscosity, with SOLPS-style viscosity flux limiter

Needs to be calculated after collisions, because collision frequency is used to calculate parallel viscosity

References

• https://farside.ph.utexas.edu/teaching/plasma/lectures1/node56.html

Public Functions

BraginskiiElectronViscosity(const std::string &name, Options &alloptions, Solver*)

Inputs

• <name>

  • diagnose: bool, default false Output diagnostic SNVe_viscosity?

  • eta_limit_alpha: float, default -1.0 Flux limiter coefficient. < 0 means no limiter

virtual void outputVars(Options &state) override

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

Private Functions

virtual void transform_impl(GuardedOptions &state) override

Inputs

• species

  • e

    • pressure (skips if not present)

    • velocity (skips if not present)

    • collision_frequency

Sets in the state

• species

  • e

    • momentum_source

Private Members

BoutReal eta_limit_alpha

Flux limit coefficient.

bool diagnose

Output viscosity diagnostic?

Field3D viscosity

The viscosity momentum source.