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필요한 최적의 소프트웨어와 컨설팅을
공급하도록 노력하겠습니다.
 
 

Comprehensive and Powerful

AIR/W is a finite element software product for analyzing groundwater - air interaction problems within porous materials such as soil and rock. Its comprehensive formulation allows you to consider analyses ranging from simple, saturated steady-state problems to sophisticated, saturated-unsaturated time-dependent problems. You can apply AIR /W to the analysis and design of geotechnical, civil, hydrogeological, and mining engineering projects.
 

Saturated / Unsaturated Flow

AIR/W can be applied to both saturated and unsaturated zones, a feature that greatly broadens the range of problems that can be analyzed. In addition to traditional steady-state water flow assumptions where the air contents are fixed, the saturated/unsaturated formulation of AIR/W makes it possible to analyze air flow and seepage as a function of time and to consider such processes as changing air and water contents. When linked with TEMP/W, it can account for air and water flow in freezing and thawing soils where the air density changes due to temperature changes.
 

Typical Applications

AIR/W can model geotechnical problems including:
  • Soil vapor extraction systems
  • Air pressure in tunnels for support and water inflow control
  • Air pressure response ahead of water infiltration fronts
  • Thermal / density dependent air flow that contributes to convective heat transfer in freezing / thawing soils (when coupled with TEMP/W)
  • The true matric suction (Ua-Uw) phenomenon
  • 이외에 더 많은 기능이 있습니다.
 
(큰 이미지 보기 ☞ click)
 

Features

  • Analysis types include steady-state confined and unconfined flow, transient flow, 2-D flow in a cross-section or in plan view, and 3D axisymmetric flow
  • Boundary condition types include total head, pressure head, or flux specified as a constant or a function of time; pressure head; transient flux as a function of computed head; review and adjustment of seepage face conditions
  • Volumetric water content and conductivity functions can be estimated from basic parameters and grain-size functions
  • Adaptive time stepping to ensure the use of optimal time steps in transient analyses with sudden changes in boundary conditions
  • Flow path delineation
  • Undo and redo commands
    이외에 더 많은 기능들이 있습니다.

Formulation

Soil Properties
The hydraulic conductivity of the soil is a function of the negative pore-water pressure in the unsaturated regions. The rate of change in water content is dependent on the pore-water pressure during transient processes. Hydraulic conductivity can be defined as anisotropic in two orthogonal directions.
Iterative Process
The nonlinear nature of the finite element equations is handled using an efficient radial search iterative scheme. Graphing tools are available during run-time to help you judge if convergence has been achieved. This has proved to be extremely useful in solving highly nonlinear flow systems.
Flux Quantities
AIR/W computes the total flux across single or multiple lines drawn through the mesh.