SOTUF - an ERC starting grant at EM2C
SOot in TUrbulent Flames: a new look at soot production processes in turbulent flames leading to novel models for predictive LES
SOTUF is an ERC starting grant (see erc.europa.eu/starting-grants for information on ERC starting grants) dedicated to the study of soot production in turbulent flames combining advanced space- and time-resolved optical diagnostics and high-fidelity numerical simulations. The goal of the present project is to provide new insights on the processes governing soot production in turbulent flames to develop novel Large Eddy Simulation (LES) models, encompassing the state-of-art and allowing reliable predictions of soot in turbulent flames.The project is coordinated by CNRS (DR04 Ile-de-France Sud) and lead by the EM2C laboratory. SOTUF started in June 2018 and will run for five years. The Principal Investigator of SOTUF is Dr. Benedetta Franzelli.
Many practical systems emit soot into the atmosphere as a result of incomplete combustion of hydrocarbons. This pollutant emission is characterized by a distribution of solid carbon particles with different sizes and shapes, which have negative effects on human health and environment. Controlling such emission represents a societal issue and an industrial challenge that require a deep understanding of the intricate processes underlying soot production in the turbulent flames that generally characterize practical systems. In this context, progress in numerical simulations is essential to the successful design of low-emission combustion systems.
Unfortunately, the Large-Eddy Simultations (LES) approach, which has successfully demonstrated its capacity to represent gaseous turbulent combustion processes, is far from being predictive for soot emission. Indeed, soot production in turbulent flames is a complex process which is not easy to be represented with the classical LES strategy: the long time scales and the broad range of length scales place soot processes outside the usual scale ranges of LES subgrid models.
In this context, the goal of the present project is to provide new insights on the processes governing soot production in turbulent flames to develop novel LES models, encompassing the state-of-art and allowing reliable predictions of soot in turbulent flames. These objectives will be achieved by:
- Characterizing the turbulence-flame-soot coupling from novel well-controlled experiments employing advanced space and time resolved optical diagnostics.
- Developing new subgrid models based on information extracted from experiments and high-fidelity simulations.
- Validating and applying the developed LES modeling strategy on complex systems.
The research results are expected to drastically improve the prediction of soot production in industrial configurations, helping to design new low-emission systems with notably reduced soot levels.
Open positions for 2019-2020 academic year
The EM2C CNRS Laboratory is seeking for highly qualified candidates for a PhD/PostDoctoral fellowship in the area of experimental characterization and/or numerical modelling of solid particles production in turbulent flames. The successful candidate will have access to the most advanced experimental equipment and numerical codes for the investigation of solid particles production in turbulent flames. He/she will also profit of the presence of many experienced researcher scientists (Dr. B. Franzelli, Eng. P. Scouflaire, Dr. Denis Veynante, Pr. N. Darabiha and Pr. S. Candel) and of the active collaborations with experts in physical chemistry from Politecnico di Milano, in experimental activities on laminar flames from UPMC and in massively-parallel LES from Cerfacs.