Moisture intrusion in viscoelastic porous media: Induced-stress and deformation

Theory of Deformation of a Porous Viscoelastic Anisotropic Solid

Equations are established for the deformation of a viscoelastic porous solid containing a viscous fluid under the most general assumptions of anisotropy. The particular cases of transverse and complete isotropy are discussed. General solutions are also developed for the equations in the isotropic case. As an example the problem of the settlement of a loaded column is treated. The second-order e...

Numerical Simulations of Viscoelastic Flows in Fibrous Porous Media

Moisture content effect on radon emanation in porous media

It is impractical to establish the detailed recoil range distribution and to measure the rough recoil surface of the porous media experimentally. Thus a computer based modelling approach is followed. The ion collision theory of nuclear physics provides the basics for calculating the recoil range distributions for radon within solid, water and air. The collision history is established by the mod...

Mathematical Modelling of Moisture Induced Panel Deformation

Extensional deformation, stress relaxation and necking failure of viscoelastic filaments

We investigate the transient viscoelastic behavior of weakly strain-hardening fluids in filament stretching devices during uniaxial elongation and following the cessation of stretching. The numerical results are compared with experimental observations on a concentrated shear-thinning polystyrene solution which is well characterized by a multi-mode Giesekus model. The finite element computations...