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Computational modelling and simulation for industrial thermo-fluids applications

Final Activity Report Summary - COMSITA (Computational modelling and simulation for industrial thermo-fluids applications)

Recognising the key role of 'Computational modelling and simulation' (CMS) of natural and man-made phenomena in scientific investigation and engineering design, and especially the potential of modelling and simulation of flow, turbulence and associated transport phenomena for solving various problems encountered in industry and environment, the main scientific objectives of this project were set on the development and exploitation of ever more comprehensive, complete and hence realistic mathematical models of turbulent flows, heat and mass transfer that facilitate the analysis, control, design and optimisation of processes and equipment in science and engineering in their full complexity.

Through active research of novel modelling and simulation approaches and broad teaching and training programme, the project has fulfilled its goal in enhancing the research and education of junior academic staff and graduate students (MSc, PhD) in the Department of Mechanics and Aeronautics (DMA) and Faculty of Engineering (FE) of Sapienza University of Rome in general, in the field of applied computer simulations and modelling of complex turbulent flows with focus on thermo-fluids equipment and environmental engineering. The goals set were achieved by utilising the expertise of the MC chair holder in turbulence modelling and simulations with the internationally recognised expertise in computational methods, phenomenological and applied research in several groups in the host institution.

The project focused on emerging topics in CMS, regarded as the mainstay of the future industrial and environmental computational fluid dynamics:
* Advanced second-moment and eddy-viscosity Reynolds-averaged Navier-Stokes ("RANS") models, for real-scale complex unsteady flows;
* Large-eddy simulations (LES) with innovative subgrid-scale (sgs) models, compound wall treatment and new concepts of filtering and regularisation;
* Instability-sensitised unsteady RANS (URANS) and blended (hybrid) LES/RANS combining the RANS and LES strategies;
* Application of the above modelling and simulation methods to a range of situations involving industrially relevant turbulent fluid flow, heat transfer, particle transport and deposition on solid walls and combustion in industrial devices.

The research was pursued by the junior academic staff of DMA and/or FE as well as MSc and PhD students and/or postdocs under joint guidance of the chair-holder and the host academic staff. In parallel, three new MSc/PhD lectures courses (in total of about 100 hours per year) were introduced on advanced RANS, LES and hybrid methods. Finally, industrial courses and Workshops were also organised aimed at application of CMS to specific industrial and environmental areas.

The project expanded the multidisciplinary competence and enhanced the capabilities of DMA and FE in CMS to the rank of leading groups in Europe and world-wide, contributing thus to the development of the European Research Area in accord with the Human Resource and Mobility program. It also increased interaction of the host institution with industry in various engineering and environmental project and, thus, enhanced the competitiveness of Italian and European industries, especially in the areas of aeronautics, turbomachinery, vehicles and engines, power and process equipment, and in energy and environmental engineering.