Numerical simulation of non-isothermal multiphase multicomponent processes in porous media. 2. Applications for the injection of steam and air

In part 1 [Class et al., this issue], we presented a numerical simulator for non-isothermal multiphase systems. A module of this simulator that considers the phases water, an organic non-aqueous-phase liquid (NAPL), and the gas phase is used here for two applications. The aim of the numerical simulations is to show and to interpret the behavior of the non-isothermal multiphase processes. The first example deals with an experiment in which an air-dry, NAPL-contaminated column is remediated by a steam injection. The typical front behavior is investigated and the coupled physical processes are identified by a comparison with experimental temperature data. The second application is a two-dimensional case study, where the influence of different strategies for the remediation by injection of steam and/or air in a heterogeneous, NAPL-contaminated sand can be shown.

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