Quasi 3

Quasi 3-D Refined Flow and Contaminant Transport Modeling for Natural Waters

Motor Vehicle Emission Modeler/Analyzer

Multiple Source Air Quality Modeler/Analyzer

Uses:

Simulations and analyses for problems relative to flows, contaminant transport, river diversion, stream pollution and accidental discharges.

Teaching and research on Hydrodynamics, Computational/Environmental Hydraulics, Computational/Environmental Fluid Mechanics.

* Versatile quasi three-dimensional hydrodynamic model, closed by turbulence depth-integrated two-equation models; solving complete fundamental governing equations, in association with passive mass transport equation(s) and turbulence parameter transport equations, discretized by FVA (Finite Volume Approach) through spatially collocated variable arrangement on non-orthogonal boundary-fitted grids.

* Advanced algorithms for solving linear equation systems: SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) algorithm, ILU (Incomplete Lower-Upper) decomposition, SIP (Strongly Implicit Procedure), under relaxation and multi-grid iterative method.

* Easy-to-use grid-generator, flow-transport-solver, GUI, self-contained map support tool, help system, pre- and post-processors, used in various Windows-based microcomputers.

* User-friendly powerful map support tool for pre- and pro-processing, including basic color inspection, map-scale determination, riverside/island boundary geometrical data auto-inserter to tables, digital map background, map enlargement, shrink, storage and print, and so on.

* Up-to-date visualizations for computational conditions and calculated results. By using mouse, buttons and a few of keys, users can easily obtain various graphics.

* Convenient enter data through dialog boxes, tables and digital map; input data display, revision, print and storage; output results display, print and storage.

* Easily simulating and analyzing steady and unsteady flow and contaminant transport behaviours in natural waters, including open channels, rivers, estuaries and coastal regions.

Ex-1. A quasi 3-D modelling by using turbulence two-equation closure models (turbulence depth-averaged k-ε, k-w and k-omega models) for flow and contaminant transport in a strongly meandering natural river. Clicking Albums can see the details of pollutant plume development.

River1.0 collects geometrical data from the digital map of a meandering river reach

Bottom topography Fine grid

Flow pattern Color-filled concentration field

Ex-2. A quasi 3-D modelling by using turbulence two-equation closure models (turbulence depth-averaged k-ε, k-w and k-omega models) for flow and contaminant transport in a multiply connected domain of natural river. Clicking Albums can see the details of pollutant plume development.

River1.0 collects geometrical data from the digital map of a multiply connected computation domain

Coarse grid Streamlines

Flow pattern Concentration contours

Ex-3. A quasi 3-D modelling by using turbulence two-equation closure models (turbulence depth-averaged k-ε, k-w and k-omega models) for flow and thermal transport in a cooling pool. Clicking Albums can see the details of thermal plume development.

Coarse grid Streamlines

Flow pattern Temperature contours

Color-filled temperature fields

Ex-4. A quasi 3-D modelling by using turbulence two-equation closure models (turbulence depth-averaged k-ε, k-w and k-omega models) for flow and pollutant transport discharged from a submerged five-port diffuser in a natural river reach with two islands. Clicking Albums can see the details of pollutant plume development.

Flow pattern

Color-filled concentration fields

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