A three-dimensional simulation of the Underground coal gasification (UCG) process is studied in terms of the heat and mass transport phenomena and chemical kinetics in a coal seam during coal combustion by applying the controlled retracting injection point technique. The STARS module of the Computer Modelling Group software is used in this study. The gas species flow rate, cavity shapes, and temperature profile in the coal seam during gasification are investigated. The main motivation behind this study is to provide a simulation methodology by using a comprehensive porous media flow approach to understand the critical aspects of the UCG process.
Une simulation tridimensionnelle du processus de gazeification in situ du charbon (UCG) est etudiee en fonction de la chaleur, des phenomenes de transport de la matiere ainsi que de la cinetique chimique dans une veine de charbon lors de sa combustion en appliquant la technique de retraction controlee du point d'injection. Le module STARS du logiciel informatique de modelisation du groupe est utilise dans cette etude. Le debit de l'espece de gaz, les formes de cavites, et profil de temperature dans la veine de charbon lors de la gazeification sont etudies. La principale motivation de cette etude est de fournir une methodologie de simulation en utilisant une approche globale de l'ecoulement en milieu poreux afin de comprendre les aspects critiques du processus de UCG.
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