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Modelling of multi-component, multi-phase reacting flows in porous and fractured media is investigated with examples on spontaneous combustion of coal and the extraction of coalbed methane. Chemical reactions, adsorption, gaseous diffusion and changes in transport properties (porosity and permeability) are of particular importance. These matters along with numerical dispersion and stiffness are discussed in the first four chapters.
A new power law model for representing the diminishing reaction effect during self-heating reactions was proposed, and compared with existing models. A modified...