This article describes the imbibition process from a point source into a homogeneous semi-infinite porous material.
When body forces are negligible, the advance of the wetting front is driven by capillary pressure and resisted by viscous forces. With the assumption that the wetting front assumes a hemispherical shape, the analytical results show that the absorbed volume flow rate is approximately constant with respect to time, and that the radius of the wetting evolves in time as r ≈ t1/3. This cube-root law for the long-time dynamics is confirmed by experiments using a packed cell of glass microspheres with average diameter of 42 μm. This result complements the classical one-dimensional imbibition result where the imbibition length ≈ t1/2, and studies in axisymmetric porous cones with small opening angles where ≈ t1/4 at long times. (publisher abstract modified)
Downloads
Similar Publications
- Assessment of Sexual Assault Kit (SAK) Evidence Selection Leading to Development of SAK Evidence Machine-Learning Model (SAK-ML Model)
- An Inter-laboratory Comparison of Probabilistic Genotyping Parameters and Evaluation of Performance on DNA Mixtures from Different Laboratories
- Graphic Description – Frequently Used Data Elements Collection Systems And Primary Documentation