Rueil-Malmaison

Mesoscopic modeling of ion exchange membranes for energy conversion applications

The proposed PhD is taking place in the general context of the development of hydrogen-powered electric vehicles and more specifically aims to improve the tools for modelling and characterizing polymer membranes used in Proton Exchange Membrane Fuel Cells (PEMFC). In this fuel cell technology, in addition to the anode and the cathode, which are the sites of the oxidation of hydrogen and the reduction of oxygen respectively, there is a solid electrolyte made up of a cation-conducting polymer which transfers hydrated protons between the two compartments of the cell.

Gaussian processes modeling for floating offshore wind turbine fatigue in wind farm context based on input/output dimension reduction

To support the development of electricity production from wind power, IFP Energies nouvelles is involved in the energy transition as a research and training player, especially in emerging technologies such as floating offshore wind turbines (FOWT). 

Optimizing 2G biorefineries production using synthetic consortia

Through various research programs, IFP Energies nouvelles is now strongly involved in the development of bioprocesses for biofuels and bio-based chemical intermediates. The overwhelming majority of bio-based fermentation products are obtained today through a microbial monoculture approach. However, this approach faces limits when it comes to complex biotransformations. Furthermore, at industrial scale, fermentations cannot be carried out under perfectly aseptic conditions. Bioprocesses are therefore regularly subject to chronic or acute contamination.

Development of a characterization protocol for the thermal runaway phenomenon of Li-ion batteries

The Li-ion battery is the technology currently used by car manufacturers to provide the energy storage required for electrified vehicles. However, these Li-ion batteries can be the source of incidents with potentially dramatic consequences that can have various origins but are grouped under the term thermal runaway. Thus, understanding and controlling thermal runaway is a major issue from a safety and economic point of view for the car industry.

Development of a magneto-mechanical model to consider the impact of manufacturing processes on electrical steels

Following the rapid emergence of electric vehicles on the automotive market, manufacturers are seeking to regularly improve the performance of their products in order to stand out from the competition. The sizing phase of the electric machine is therefore important, and designers often use multi-objective optimization methods coupled with multi-physical models that describe the performance of the machine with great precision. These models are based on the geometrical parameters of the design to be simulated and on the physical characteristics of the materials given by the suppliers.

Sedimentological, mineralogical and diagenetic controls of particle transport in the Albian sands aquifer of the Paris Basin

The Albien aquifer constitutes a deep reservoir located under the chalk of the Parisian basin composed of unconsolidated clay-sandstone deposits and is considered as a strategic resource for Ile de France in the event of long-term unavailability of classic resources. The deposits present a complex sedimentary architecture at the scale of the sedimentary system and a complex distribution of clayey heterogeneities at the scale of the reservoir, both disturbing the fluid flow within the aquifer.

Contribution of high-fidelity fluid-structure coupling to the modelling of new generation wind turbines

Cost reduction strategies for wind energy are leading to the development of increasingly large wind turbines (today nearly 300m for the tallest), located in offshore environments with favorable wind conditions. Compared to smaller models, the blades of these large rotors deform significantly, especially when facing extreme events (high winds, emergency stops). Aeroelastic coupling effects are therefore becoming increasingly critical.

Effect of Zero-carbon combustion on lubricant aging and its impact on emissions

The general context of transport is undergoing profound change, in particular through stricter considerations of the impact of its emissions on the environment and the air quality in real use. The use of innovative carbon-free fuels, such as hydrogen (H2) and ammonia (NH3), is a way to limit emissions at the source. However, the combustion characteristics of these fuels exhibit unusual combustion properties compared to hydrocarbons. These combustion systems impact the properties of the lubricant with potentially greater thermal stress and increased dilution of oxidizing components.

Study of dynamic interfacial properties with a microfluidics tensiometer: Experimental and multi-scale approach

Emulsions are systems present in many industrial processes and products. Their stability depends on the density difference between the dispersed and continuous phases and on their rheology (creaming or sedimentation), on the interactions between the drops (coalescence) and on their polydispersity (Oswald ripening). The interactions between the drops are notably governed by the value of the interfacial tension (IFT) and by the kinetics of diffusion and adsorption of the surfactants at the interfaces.