In this paper we present a rigorous derivation of the effective model for enhanced diffusion through a narrow and long 2D pore. The analysis uses a singular perturbation technique. The starting point is a local pore scale model describing the transport by convection and diffusion of a reactive solute. The solute particles undergo a first-order reaction at the pore surface. The transport and rea...

Pore-water solute transport processes acting in addition to molecular diffusion affect sediment biogeochemistry and benthic exchange fluxes. Given the relatively few direct measurements of enhanced transport intensities, there is a need for predictive relationships to calculate enhanced transport parameters from more readily available information. Here, enhanced diffusion coefficients and nonlo...

A finite element formulation of neutral solute transport across a contact interface between deformable porous media is implemented and validated against analytical solutions. By reducing the integral statements of external virtual work on the two contacting surfaces into a single contact integral, the algorithm automatically enforces continuity of solute molar flux across the contact interface,...

The long-term goal of this project is to develop multicomponent reactive transport models that can be used to accurately describe solute transport in temporally and spatially heterogeneous, organic-rich sediments. To achieve this goal, we have developed a model that can be used to obtain unbiased 1D quantitative descriptions of biologically-enhanced solute transport (bioirrigation due to macrof...

A finite-element approach was formulated, aimed at enabling an integrated study of mechanical and biochemical factors that control the functional development of tissue engineered constructs. A nonlinear biphasic displacement-velocity-pressure description was combined with advective and diffusive solute transport, uptake and biosynthesis. To illustrate the approach we focused on the synthesis an...

this study was reported by Regalado et al. (2003) and Muñoz-Carpena et al. (2005). Volcanic soils exhibit particular physical-chemical properties (i.e., The intensive use of agrichemicals in volcanic agriculstrong and stable natural aggregation and high content of variablecharge minerals) that may influence solute transport. To determine tural fields, as for many other areas of the world, has l...