Mbabaye, Godfrey Kabula2020-05-282020-05-282007Mbabaye, G.K (2007) Modeling PCE (Tetrachloroethylene) dissolution in chemically heterogeneous porous media, Master dissertation, University of Dar es Salaam. Dar es Salaam.http://41.86.178.5:8080/xmlui/handle/123456789/11609Available in print form, East Africana Collection, Dr. Wilbert Chagula Library, Class mark (THS EAF RA1242.T45M3252)Non Aqueous Phase Liquid (NAPL) includes commonly occurring organic contaminants such as gasoline, diesel fuel, chlorinated solvents, etc. When released to environments their spreading and dissolution is a complex process. At contaminated sites, depending on the heterogeneity of the subsurface, NAPL remain in the subsurface in the form of small pools. Dissolution of these pools will control the overall quality of the contaminated subsurface soil and associated ground water. This dissertation was carried out to examine effectiveness of MISER to model the dissolution of DNAPL in fractional wettability heterogeneous porous media. DNAPL dissolution in a two dimension sand box was studied in this thesis. The computational domain (30cm horizontal, 40cm high, and 1.7cm width) was discretized using a grid of 80 vertical nodes and 30 horizontal nodes (spacing 0.5cm vertical and 1.0cm horizontal). Mixtures of F20/F30, F35/F50 and F70/F110 Ottawa sand were packed in the sandbox and thereafter the domain was simulated using MISER model. The simulation results indicated that MISER model yields good predictions of DNAPL dissolution in heterogeneous porous media with fractional wettability. The hydraulic properties of the computational domain used in this study correspond to an infiltration study conducted before. I would recommend that natural wettability parameters and subsurface formation (probably in Dar es Salaam) be quantified and investigate dissolution behaviour in heterogeneous natural environment using the same MISER model.enTetrachloroethyleneModeling PCEHeterogeneous porous mediaThesis