shear_stress spf.nuT*ppr(uy) "Shear stress"
Cs1000 2000*friction_s/Ub^2 "Friction coefficient (x1000) at the solid wall"
Cp1000 2000*friction_p/Ub^2 "Friction coefficient (x1000) at the porous interface"
utau_s sqrt(friction_s) "Friction velocity at the solid wall"
utau_p sqrt(friction_p) "Friction velocity at the porous interface"
Retp utau_p*H/nu_i "Friction Reynolds number based on utau_p"
Rek utau_p*sqrt(kappa_i)/nu_i "Permeability Reynolds number"
C_help_var 2000*(nu_i/sqrt(kappa_i)/Ub)^2 "Help variable for calculating experimental Cf and Cp"
y_H y/H "Plot coordinate"