25 auto const& medium = media_data.
medium;
27 out.
chi_S_L = medium.property(MPL::PropertyType::bishops_effective_stress)
28 .template value<double>(variables, x_t.
x, x_t.
t, x_t.
dt);
30 out.
dchi_dS_L = medium.property(MPL::PropertyType::bishops_effective_stress)
31 .template dValue<double>(
32 variables, MPL::Variable::liquid_saturation, x_t.
x,