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UTCHEM (software modeling subsurface flow) Background Industry throughout the world uses large quantities of organic liquids. These byproducts of the industrial process represent the most common type of soil and groundwater pollutants. Dense nonaqueous phase liquids (DNAPLs) such as chlorinated solvents are among the most frequently encountered and serious types of organic contaminants.

This innovative and powerful software tool builds sector models in minutes rather than the. EOR models or UTCHEM can be. UTCHEM (software modeling subsurface flow. Free software and on-line resources for modeling. [Only the educational version is free.] Groundwater Modeling. The UTCHEM code has been modified to.

Many conventional remediation techniques have proven to be unsuccessful or of limited success in remediating soil and groundwater contaminated by DNAPL. Active research models promise technology that avoids at least some of the problems and limitations of many existing remediation methods. However, none of these models account for the effects of surfactant on interfacial tension (IFT), surfactant phase behavior, capillary number, or surfactant adsorption. Invention Description UTCHEM can be used to simulate a wide range of displacement processes at both the field and laboratory scales. The model is a multiphase, multi-component, three-dimensional finite-difference simulator. The model was originally developed to model surfactant enhanced oil recovery, but modified for applications involving the use of surfactant for enhanced remediation of aquifers contaminated by NAPLs. The balance equations are the mass conservation equations, an overall balance that determines the pressure for up to four fluid phases, and an energy balance equation to determine the temperature.

The number of components is variable depending on the application, but would include at least surfactant, oil, and water for surface enhanced aquifer remediation (SEAR) modeling. When electrolytes, tracers, co-solvents, polymer, and other commonly needed components are included, the number of components may be on the order of twenty or more. When the geochemical option is used, a large number of additional aqueous components and solid phases may be used.