Mechanical Theory for Drying of Porous Media.

摘要

The basis of a rational phenomenological theory for drying of porous media is derived for a single equivalent drying pore by applying two-fluid,two-phase flow theory. Simplifications are made to compare with other theories and models proposed or assumed in the literature to assess their correctness. The derivation illustrates the rational way bulk motion is introduced within the porous matrix. Explicit expressions are also obtained for the evaporation rate and phase permeabilities. The extension to a global drying model is made. A solution procedure for a simplified version of the model is outlined and an estimate of the coal semi-coking zone is provided by solving an analytical solution for another simplified model. (ERA citation 03:049386)