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Laboratory: LAMIH UMR CNRS 8201 (Laboratoire d’Automatique, de Mécanique et d’Informatique Industrielles et Humaines) Université Polytechnique Hauts-de-France - Le Mont Houy 59313 Valenciennes cedex 9 FRANCE
PhD Thesis director: Céline MORIN (LAMIH UMR CNRS 8201, Université Polytechnique Hauts-de-France, Valenciennes), Sofiane KHELLADI (Arts et Métiers Sciences et Technologies, LIFSE, ENSAM Paris)
PhD supervisors: François Beaubert, Damien Méresse, David Uystepruyst (LAMIH UMR CNRS 8201, Université Polytechnique Hauts-de-France, Valenciennes)
E-mails:
celine.morin@uphf.fr;
francois.beaubert@uphf.fr;
damien.meresse@uphf.fr;
david.uystepruyst@uphf.fr
Start: October 2020
Candidate profile: Master in fluid mechanics, energetics.
Send a full curriculum vitae and motivation letter, diploma and transcript of grades (last 3 years) and 2 references or recommendation letters. The candidate is free to add other documents.
Abstract:
The subject deals with the development of numerical models able to represent complex fluid flows loaded with fine particles coming from human activities such as combustion heating system (biomass, wood) and transport (exhaust gas, abrasion: brake/tire). This subject is particularly focused on sanitary effects linked to atmospheric pollution and associated health issues. The main scientific bottleneck is the choice of the most relevant modelling according to the flow characteristics and its loading properties (mean size, composition and concentration). The modelling of particle transport can be done by discrete methods (Lagrangian) or by continuous methods regarding the particles concentration. The development will be done using multi-physics simulation tools OpenFOAM which consists in C++ libraries, different tools and applications, allowing to solve PDE by finite volume method. The developed models will be used in loaded flow control and must be as universal as possible in order to simulate different applications. The targeted applications will be, especially, the combustion and the railway transportation. Both those domains, widely studied in the laboratory, yield different operating conditions in term of particles size, concentration and type, as well as in term of flow characteristics (temperature, chemical composition, topology). The developed models will be validated on different experimental setups using velocimetry measurements (PIV, LDA, hot wires) and fine particle emissions measurement. For the combustion domain, soot particles will be characterized in the chimney of a 10 kW biomass boiler supplied by wood pellets. The boiler is equipped with an optical window and different probes in order to characterize the combustion conditions and the flow inside the chimney. For the rail domain, a brake bench allows to reproduce the friction contact between the disc and pads taking into account interface conditions: slip velocity, contact pressure, temperature. This bench is equipped with dust chamber for the emitted particles and a granulometry device (OPS, SMPS) and allows the visualization of the particles trajectories using laser and fast camera during the braking phase.