| Our three main simulation packages are: NEAT-CG, NEAT-OG and FASTE NEAT-CG is the Cartesian grid version for fluid-flow analysis used for geometry such as that found in buildings, electronic boxes, etc. (see Gallery for examples of Cartesian and embedded grids ) NEAT-OG is the orthogonal grid version for flow analysis used for geometry such as that found in external aircraft configurations , internal engines, etc. (see Gallery for examples of orthogonal grids) Both these versions operate by solving the governing differential equations for the flow physics by numerical means on a computational mesh. 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-fitted 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" (see Gallery for example of non-orthogonal grid) 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 liquids containing up to 30 chemical species. Chemical Reaction - several built-in options are available for calculating chemically-reacting flows, including those controlled 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. PRE-PROCESSOR SECTION OF THE PACKAGES Here 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. POST-PROCESSOR The graphical user interface allows for, viewing planes, flow representation by vectors, temperature, concentration and other scalar representation by line or contours, zoom, graph generation facilities. (see Gallery for examples of post-processor results) 2003 - 2009 CFD Consultancy Group, All rights reserved |
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