chang_hinton_chi

fusion_core::transport

Function chang_hinton_chi 

Source 
pub fn chang_hinton_chi(
    rho: f64,
    t_i_kev: f64,
    n_e_19: f64,
    q: f64,
    params: &NeoclassicalParams,
) -> f64
Expand description

Chang-Hinton (1982) neoclassical ion thermal diffusivity [m²/s].

χ_i^NC = 0.66 (1 + 1.54 α) q² ε^{-3/2} ρ_i² ν_ii / (1 + 0.74 ν*^{2/3})

where ε = r/R is the local inverse aspect ratio, ρ_i is the ion gyroradius, and ν* = ν_ii qR / (ε^{3/2} v_ti) is the collisionality parameter.