descriptors_braginskii_m Module

Takes the upwind value (i.e. first order local neumann) If pen_bndval_into or pen_bndval_out are supplied, they should be in the range 0 <= val <= 1, which will give a local gradient by setting the boundary value as val * upwind_value Note that val=1 has no effect, while val->0 applies an increasingly strong gradient. val > 1 is allowed if you want to experiment with positive gradients

Applies upar = \pm c_s, where the sound speed is evaluated locally

Applies upar >= \pm c_s, where the sound speed is evaluated locally

Applies upar = pm c_s, where the sound speed is interpolated to the target value

Applies upar = pm c_s, where the sound speed is interpolated to the target value

Applies Bohm-Chodura sonic boundary conditions with drift corrections, i.e.: upar = pm c_s -v_E*n / (n \cdot b)

Applies Bohm-Chodura boundary conditions with drift corrections, i.e.: upar >= pm c_s -v_E*n / (n \cdot b)

Zonal Neumann boundary condition usable for potential at core

Applies potential = Lambda * T_e, for the local electron temperature and Lambda \approx 2.69 as the sheath potential difference

Applies potential = Lambda * T_e, for the target-interpolated electron temperature and Lambda \approx 3.1 as the sheath potential difference

Applies jpar = 0 boundary conditions at targets Smoothly penalised to zero