Category Contaminant transport (2D FEM)
Publisher  GEO-SLOPE International Ltd. 
Platform Win2000, WinXP, Vista
Status Commercial
Description CTRAN/W is a finite element program for contaminant transport analysis through soil or rock. It is used in tandem with SEEP/W which computes the water flow velocity, water content and water flux. CTRAN/W includes mass transport analysis features for: transient concentrations and mass flux boundary conditions, free exit boundary conditions, molecular diffusion coefficient as a function of volumetric water content, independent coefficients of dispersivity in two orthogonal directions, adsorption as a function of concentration, mass loss due to radio-active decay, simulation of transport through fractured rock, a time step sequence independent of the corresponding SEEP/W analysis. The total, advective, dispersive, stored and decayed mass flux is determined across user defined sections. Contaminant movement can be modelled by tracking particles from user defined locations, or by backward tracking from the sink or exit point. The output consists of contours of: concentration, total mass, fluid mass, solid mass, adsorption, Peclet and Courant numbers, dispersive coefficients, flow velocities, total accumulated mass within the system or within any element or group of elements. Computed parameters can be plotted as a function of time or space. New features in 2007 version: Multiple analyses of similar or different types can be done in a single project file. Different solutions can be compared in the same file. Staged analyses can be done for construction sequencing with moving boundary conditions. Define boundary conditions and material properties by geometry region, rather than on the finite element mesh. Unstructured quadrilateral mesh with fine-tuning options. Interface elements can be added on lines to model soil-structure interactions, liners and geo-fabrics, cutoff walls and wick drains. Define a results graph on a geometry object (line, point, or region) or on a cut line or plane. Plot multiple results graphs together to compare data. Make a movie of analysis results to show how results change over time. Custom user add-in functions to define material property or boundary condition functions using internal solver data or external data held in Excel or any other .NET program. Examples with a detailed discussion on how to use and apply the relevant features and how to interpret the results. Fault-tolerant licensing on a wide area network. A free evaluation version is available.
Cost US Dollars 1995, free evaluation version
Data formats supported None stated
Supplier in Canada  GEO-SLOPE International Ltd. 

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