PHYSICAL MODELS

fluidyn-POLLUSOL solves the mass, momentum and energy conservation equations of flows. Uses Cartesian both laterally as well as vertically. Studies concerns related to municipal, industrial and hazardous waste disposal activities. Takes in consideration : porosity in x,y, and z direction

BOUNDARY CONDITION:

• Inflow Boundary Condition:
  At inflow boundaries, either pressure or flux and solute boundary conditions.
  
• Outflow Boundary Condition
  At inflow boundaries, either pressure or flux and solute boundary conditions.

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NUMERICAL FEATURES:

Based on solving the saturated ground water flow equation, unsaturated ground water flow equation and solute transport equation in coupled way it simulates water flow and solute transport in three-dimensional
saturated-unsaturated ground water flow systems.

These equations are coupled through the dependence of adjective transport on the fluid velocity field, dependence of fluid viscosity on temperature and solute concentration, the dependence of fluid density on pressure, temperature and solute concentration and the exchange of constituents between unsaturated and saturated zones.

Numerical solutions are obtained for each of the dependent variables

Pressure in saturated zone   Suction head in unsaturated zone   Solute concentration.

Finite Difference techniques are used for the spatial and temporal discritisation of the equations

Specified value and specified flux boundary conditions are incorporated and they     may vary with time. Specified heat and solute flux boundary conditions are available. The leakage boundary conditions are generalized and a river leakage boundary     condition is available. Porous medium, thermal properties, dispersivity and compressibility may have     spatial variation. A point distributed finite difference grid is employed. Global flow, heat and solute balance calculations are performed including flux     calculations through specified pressure, temperature and mass fraction     boundaries.

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USER INTERFACE

The software contains all the Pre and Post processing facilities in a fully menu-driven graphical user-friendly environment. The software have online context sensitive help and technical & user manuals. The pre-processor will have the following options.

The Post-Processor will offer the following facilities :

The Graphical User Interface is menu driven, user-friendly and easy to use. Online context help is available for quick help.

The Pre-Processor consists of the following modules

load meshes in different formats to feed terrain input data to visualize the terrain map a menu screen to feed the input data interactive selection of models interactive specification of boundary conditions manual control over simulation options

The Post-Processor has multiple viewport capability. Each viewport can have many plots. The following plots can be done : 

grid plots vector plot contour plot : line, filled and paint surface plot : line, filled and paint x,y graphs of residual history trace plots of any variable at monitor points generate water level maps and curves animation displays of flow transport patterns save pictures as frames which can be loaded into other WINDOWS applications,     and to make hard-copy plots directly. generate reports outlining the velocities at different locations at different times.

Animation facilities with text / graphical annotation are available for playback. Hardcopy plots on HPGL and PostScript plotters are possible. Pictures can be stored as Bitmap files (*.bmp)

The Post-Processor can dynamically display the results ( in the form of selected plots) while the solver is running. Thus, the results obtained can be monitored, input parameters changed, and the solver re-run all without leaving the software environment.

The dynamic Post-Processor further allows the user to monitor the progress of solution in case of complex problems thereby reducing total solution time.

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INPUT &OUTPUT PARAMETERS:

Input Parameters:

Output Parameters:

• Geometry of the domain.
• Fluid properties.
• Porous medium properties.
• Reference condition.
• Boundary condition information.
• Solute information and others.

• Pressure and Total Head at Various locations.
• Velocity components U,V,W at various locations.
• Pollutant quantity or concentration level at various locations
• Density and viscosity variations (due to pollutants) at various locations.
• Total Enthalpy .

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APPLICATIONS:

     Application of POLLUSOL are as follows:

• Prediction of contamination coming from land reclamation.
• Leakage through septic tanks. 
• Industrial waste disposal site. Waste water injection.
• Land filled contaminant movement.
• Sea water intrusions, fresh water storages and geo-thermal systems.
• Prediction of long term storage of radioactive disposals.
• Ground water management.

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MODELLING FEATURES:

• Modeling of heat and solute transport.
• Modeling of groundwater flow.
• Modeling of multiple sources simultaneously 
• Modeling of multiple pollutant species simultaneously
• Modeling of Transient boundary conditions.
• Modeling of 1D and 3D models for unsaturated zones
• Modeling of 2D and 3D models for saturated zones

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