Drying gels. VIII. Revision and review

In Part I of this series, a method was presented for analysis of the stresses that develop during drying of a porous body, such as a gel. That formulation did not take propert account of the effect of local variations in network shrinkage on the pressure in the liquid. In this paper, an improved analysis is presented. The form of the original equations is generally preserved, except that the pressure in the liquid is shown to depend on both the shear and bulk moduli (or viscosities), rather than simply on the bulk modulus (or viscosity). The present modification is most important for the case of a warping plate or a film on a rigid substrate. The connection of this model with those of Biot and others is discussed.