The Direct Numerical Simulation (DNS) is one of the most suitable tools for a comprehensive analysis of fluid dynamic problems of engineering interest. Nowadays, direct simulation is used to analyse flow configuration confined in small domains, due to the need of a large amount of computational resources. Hence, from a practical point of view, DNS is a computational method for testing the validity and accuracy of turbulent models and for tuning the values of the model-constants of such models. In this paper, DNS is used to study the mixing of two gaseous streams at different velocities. Such a problem is encountered in Diesel engines during the injection process. The validity of such an approach has been proven by comparing the numerical results with experimental measurements available in literature.

Direct Numerical Simulation of Gas Injection in Internal Combustion Engines

VIGGIANO, ANNARITA;MAGI, Vinicio
2001

Abstract

The Direct Numerical Simulation (DNS) is one of the most suitable tools for a comprehensive analysis of fluid dynamic problems of engineering interest. Nowadays, direct simulation is used to analyse flow configuration confined in small domains, due to the need of a large amount of computational resources. Hence, from a practical point of view, DNS is a computational method for testing the validity and accuracy of turbulent models and for tuning the values of the model-constants of such models. In this paper, DNS is used to study the mixing of two gaseous streams at different velocities. Such a problem is encountered in Diesel engines during the injection process. The validity of such an approach has been proven by comparing the numerical results with experimental measurements available in literature.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11563/17211
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