Our three main simulation packages are NEAT-CG, NEAT-OG and FASTE
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NEAT-CG is the Cartesian grid version for fluid-flow analysis used for geometry such as that found in buildings, electronic boxes, etc.
Click here for typical:
Cartesian grid
Embedded grid
NEAT-OG is the orthogonal grid version for flow analysis used for geometry such as that found in external aircraft configurations , internal engines, etc.
Click here for typical:
Orthogonal grid
Both these versions operate by solving the governing differential equations for the flow physics by numerical means on a computational mesh. In the analysis section of the packages, the types of flow phenomena currently represented include:
Steady and Transient - efficient, optimised finite-volume solution algorithms are used for each class
Laminar and Turbulent - in the turbulent case, a number of turbulence models are available.
Incompressible and Compressible - within the compressible regime, the solution algorithms allow all flow speeds to be handles, including transonic and supersonic.
Heat Transfer (Convection, Conduction and Radiation) - these can exist individually or collectively, e.g., conjugate heat transfer problems, involving simultaneous fluid convection and solid conduction, can be addressed.
Mass Transfer - the codes cater for mixtures of gases or liguids containing up to 30 chemical species.
Chemical Reaction - several built-in options are available for calculating chemically-reacting flows, including thosecontrolled by chemical kinetics and/or turbulent mixing.
Distributed Resistances (Porous Media) - volume and planar resistance modelling is provided to enable representation of flows in porous media.
Buoyancy and Rotation - the code has built-in provision for calculating flows subject to such body forces.
Dispersed Multi-Phase Flows - multi-phase systems comprising particles, bubbles or droplets in a continuous fluid phase may be calculated.
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FASTE is a simulation package for difficult geometry. It can simulate most of the flow phenomena as that of NEAT-CG and NEAT-OG except currently the flow must be incompressible.
The code,
- is suitable for incompressible flows of a Newtonian fluid in domains of arbitrary geometry
- uses non-orthogonal, boundary-fittted arbitrary numerical grids
- uses a colocated arrangement of Cartesian vector and tensor components on numerical grids making them free of troublesome so-called "curvature terms"
Click here for example of:
Non-orthogonal Grid
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In the pre-processor section of the packages, built-in Cartesian meshes or structured orthogonal body-fitted meshes may be generated. Boundary conditions of the following types are available, inlet, outlet, wall, free stream, pressure (static or total), symmetry and cyclic. Further options are available for heat and mass transfer applications as well as multi-phase flows.
In the post-processor, the graphical user interface allows for, veiwing planes, flow representation by vectors, temperature, concentration and other scalar representation by line or contours, zoom, graph generation facilities.
Click here for example of:
Contour and vector results
