Fig. 2.
Schematic representation of analytical model with penetrating AF injury. This simplified model of the IVD is represented as a pressure vessel constrained by axial, Ra, and radial, Rb, elasticity. This model is capable of three fluid transport mechanisms: injury flow, represented as a pipe of hydraulic diameter, d, which exhibits Poiseuille flow; porous flow, governed by Darcy's Law, with effective permeability, Ke; and storage, representing fluid redistribution upon radial bulging restrained by radial elasticity spring.