Migration of Liquids in Porous Media

Fluid-fluid displacement was studied in porous media by means of NMR imaging. The displacement front was imaged as one fluid displaced the fluid that initially saturated the porous media. How the fluid rheology at various driving pressure gradients and porous medium configurations affect the displacement was investigated. 

The study of penetration by waterborne wood preservatives into wood was reported. Samples of three wood species, i.e. red maple Acer rubrum L.), ponderosa pine Finns ponderosa Dougl. ex Laws.) and aspen Populus tremuloides), containing different anatomical features, e.g. sapwood, heart-wood, early-wood, late-wood, and knots, were air-dried and pressure-treated with water. MRI provides a useful method for assessment of the penetrability of wood by water and consequently waterborne preservatives. 

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