연구의 선진화와 생산성 향상에
필요한 최적의 소프트웨어와 컨설팅을
공급하도록 노력하겠습니다.
 
 

Comprehensive and Powerful

CTRAN/W is a finite element software product that can be used to model the movement of contaminants through porous materials such as soil and rock. The comprehensive formulation of CTRAN/W makes it possible to analyze problems varying from simple particle tracking in response to the movement of water, to complex processes involving diffusion, dispersion, adsorption, radioactive decay and density dependencies. /W to the analysis and design of geotechnical, civil, hydrogeological, and mining engineering projects.
CTRAN/W is integrated with SEEP/W and has the same CAD-like interface. The two software products must be used in tandem to analyze contaminant transport. SEEP/W computes the water flow velocity, volumetric water content, and water flux. CTRAN/W uses these parameters to compute the contaminant migration.
 

Typical Applications

CTRAN/W can model almost any contaminant transport problem, including:
  • Flow of contaminants from a surface pond
  • Flow of dissolved hydrocarbons
  • Flow of radioactive contaminants
  • Transport through fractured rock
  • Sea-water intrusion into coastal aquifers
  • Brine transport
  • Landfill leachate migration
  • 이외에 더 많은 기능들이 있습니다.
 
(큰 이미지 보기 ☞ click)
 

Features

  • Steady-state and transient water flow conditions through saturated and unsaturated soil systems
  • Time-dependent hydraulic boundary conditions
  • Anisotropic and heterogeneous ground conditions
  • Time-dependent concentration and mass flux boundary conditions, free exit boundary conditions
  • Molecular diffusion coefficient as a function of volumetric water content
  • Model adsorption as a function of concentration, mass loss due to radioactive decay, and mass flux across user-specified sections
  • Particle tracking isolates advection by showing the flow path of individual particles
  • Density-dependent analysis with contaminant density different than groundwater density
  • Undo and redo commands
  • 이외에 더 많은 기능들이 있습니다.
 

Formulation

When a contaminant enters the ground, the dissolved constituents will migrate due to the movement of the water. In addition, the contaminant disperses due to hydrodynamic mixing and molecular diffusion. The migration also may be retarded due to adsorption and radioactive decay. The advective-dispersive differential equation is derived by applying the principle of mass balance to an element of porous medium, with consideration of advection, dispersion, adsorption and decay.
CTRAN/W computes adsorption using the adsorption function and the computed nodal concentrations. It then computes the mass quantity in both the fluid phase and the solid phase.
CTRAN/W can also model contaminant movement by simply tracking particles from user-defined locations. For each time step, CTRAN/W moves the particles a distance based on the volumetric water content and the SEEP/W-computed water velocities.