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FIRE® is a powerful multi-purpose thermo-fluid dynamics software with a particular focus on handling fluid flow applications related to internal combustion engines and powertrains. AVL Solution We provide CFD software tailored to meet the requirements of automotive research and development teams: fast and easy to use with adjustable modeling depth, user extendable, ready for integration in your CAx environment - specialized in accurate prediction of the most demanding flow problems in respect to geometric complexity and chemical and physical modeling. AVL FIRE was developed to solve the most demanding flow problems in respect to geometric complexity and chemical and physical modeling. Beside all functionality that is offered in the FIRE General Purpose package, FIRE Engine comprises special ca pabilities and module s (as listed below) particularly designed for computing fluid flow problems related to internal combustion engines. This includes the simulation of in-cylinder phenomena such as gas exchange, fuel injection, mixture generation, combustion and emission formation, but also calculating flows in injection equipment, exhaust gas aftertreatment systems and coolant flows. The FIRE IC Engine Physics and Chemistry Module contains all features and functions required to simulate relevant physical and chemical processes related internal combustion engines. The module includes the FIRE Spray , Wallfilm and Combustion Capabilities . The FIRE Spray Capabilities provide worldwide leading technology for CFD simulation of fuel injection and mixture formation in all types of spark ignit ed and compression ignition engines. It includes more than twenty different models for spray format ion and propagation including advanced model capabilities related to spray primary and secondary break-up, droplet dispersion, collision and coalescence, single and multi-component f uel evaporation and wall interaction. The FIRE Wallfilm Capabilities enable simulation, analysis and optimization of liquid wallfilm build-up, propagation and evaporation and spray / wall and spra y / wallfilm interaction. The FIRE wallfilm models are capable of handli ng multi-component fuels. . The FIRE Combustion Capabilities are a comprehensive set of models of different levels of complexity for fast and easy analysis and optimization of ignition, combustion and emission phenomena. For spark-ignition engines knocking combustion tendency can be assessed additionally. Eddy-Break-Up, Turbulent Flame Speed Closure, Coherent Flame a nd Transported Multi-Scalar PDF models are a sound basis for simulating homogeneous / inhomogeneous and stratified charge SI engine conditions. For analysis and optimization of compression igniti on combustion systems, FIRE provides another well-validated set of models describing the indi vidual processes of auto-ignition, combustion and pollutant formation. Eddy-Break-U p, Characteristic Time Scale and the state of the art ECFM-3Z model enable the optimization of the various inje ction and combustion system parameters. Advanced NO and soot formation / depletion models assist the engine development engineer in assessing the emission characteristics of different concepts.

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