Sofiane Benhamadouche will start by an overview showing the wide range of Reynolds and Rayleigh numbers which might encountered in the nuclear industry and thus the need of different approaches to model turbulence. A first part will be dedicated to advanced RANS (Reynolds Averaged Navier Stokes) modeling through second moment closures for both the dynamic and the thermal fields.

This thesis is dedicated to the exploration of natural convection phenomena within domains characterized by a heat-generating porous matrix immersed in a pure-fluid region.

The new Thalos TEM microscope will very soon be installed in our premises. If we want to effectively use this brand-new instrument from day 1, we should start thinking of the experiments to perform with it. In this lecture, I will first present you in details what are the different possibilities offered by the instrument, the different optical modes and its ultimate performances.

Green hydrogen, produced from water electrolysis using renewable electricity, can decarbonize certain sectors such as the cement, steel, and fertilizer industries; long-haul shipping, aviation and cargo road transportation; and store and transport renewable energy.

Hydrogen is expected to accelerate carbon neutralization, but it is not common understood the property and role of hydrogen in energy systems. I would like to talk general aspects for global warming and clarifies the reason why hydrogen is selected as energy carrier for sustainable energy system using renewable energies form both basic science and real energy system viewpoints.     P

In this talk an effective and novel near-wall domain decomposition approach with non-local interface boundary conditions is developed and tested in application to model equations that simulate high-Reynolds-number flow with a boundary layer. The approach is also compared with existing non-local near-wall domain decomposition approaches in the literature and is proven to be more efficient.

Bas de Geus holds a degree in physical education and movement sciences, as well as a master's degree in rehabilitation sciences and physiotherapy. He obtained his doctorate in physical education and movement sciences, specializing in physiology and health, which he completed in September 2007.

Common vortical wake vortices as generated by aircraft, submarines, and flying and swimming animals often have non-trivial internal shapes and structures, and are subject to perturbations arising from the ambient or self-induced strain fields. In this study we first simulate straight vortex tubes endowed with core-size variations and study their long-time flow evolution.

High-order immersed methods are a class of PDE discretizations that simulate complex geometries on a background Cartesian grid while maintaining high-order accuracy in both space and time. These schemes are particularly useful for fluid simulations with moving or deforming geometries, for which the cost of maintaining a moving body-fitted mesh can become prohibitive.

For the degree of Doctor of Engineering Sciences and Technology   The need for high-resolution 3D imaging of biological tissues is a driving force behind the development of innovative technologies. Among these technologies, microfocus computed tomography (MicroCT) stands out for its exceptional spatial resolution, user-friendliness, and cost-effectiveness.