Abstract
A mathematical model is developed for analyzing the forced venting method of controlling hazardous vapors escaping from underground spills. Equations for predicting concentration profiles are derived from the fundamental laws governing the isothermal flow and dispersion of two-component, miscible, compressible fluids in a porous medium. The resulting equations are solved numerically by finite difference methods to predict concentration profiles for a two-dimensional venting process. Concentration profiles were found to be more sensitive to the dispersion coefficient than to porosity or permeability for the flow rates examined. A comparison of the model profiles with laboratory measurements indicated that realistic predictions are feasible.
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