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In this research project three different model systems with vortex ratchets will be investigated: periodic arrays of symmetric and asymmetric pinning sites, superconductor/ferromagnet hybrid nanosystems, and single element nanosuperconductors. We will use lithographic arrays and also arrays produced by hexagonally ordered two-dimensional nanopores arrays (made from anodic alumina) underlying a superconducting film. Matching-field effects, which ...

Picosecond vortex dynamics in magnetic nanostructures: the interaction between vortices and spinwaves Ghent University

Bartel Van Waeyenberge

Department of Solid State Sciences

Being the simplest non-trivial configurations of magnetic nanostructures, vortices are not only interesting study objects, but offer new perspectives for magnetic data storage. An optimally pulsed synchrotron X-ray source will be used to investigate the ultra fast dynamics of the vortex core in an X-ray microscope. Additionally, the interaction of spin waves with the core dynamics will be investigated.

Picosecond vortex dynamics in magnetic nanostructures: the interaction of vortices with spinwaves. Ghent University

Bartel Van Waeyenberge

Department of Solid State Sciences

In this project, we will address the interaction of spin waves with vortices and domain walls. These have their own dynamics, and understanding how spin waves can interact can lead to new functional magnetic devices. Magnetic resonance spectroscopy, time-resolved X-ray microscopy and advanced simulation tools will be deployed to study these interactions in nanometer sized wires and platelets.

Control of vortex properties in swirling jet flows. KU Leuven

Eric Van den Bulck

Applied Mechanics and Energy Conversion Section

This project aims to control the vortex properties of flows that result from issuing a swirling round jet through an axisymmetric exhaust nozzle, in order to enhance their applicability in combustion processes, chemical reactors, exhaust ducts and ventilation systems. We will focus on the control of the vortex properties of these swirling flows by means of flow controls in relation to multi-stage expansion nozzles such that two main objectives ...

Innovative drag reduction of streamlined vehicles by miniature vortex generators KU Leuven

Maarten Vanierschot

Applied Mechanics and Energy conversion (TME)

The principal motivation behind this project is the success of the Belgian partner at the World Solar Challenge (WSC). The aim of this competition is to drive across the Australian desert from Darwin to Adelaide (3021 km) as fast as possible using only solar energy. It is a very prestigious race (considered as the world championship), where student teams from top universities in the world participate, like Stanford, TU Delft, etc. In 2019, the ...

CFD-Assisted Design of an Innovative Multiphase Chemical Reactor for Hydrogen Release. University of Antwerp

Patrice Perreault

Sustainable Energy, Air and Water Technology (DuEL)

This thesis focuses at designing, optimising, simulating (using computational fluid dynamics, CFD) and testing a multiphase intensified chemical reactors for the fast release of hydrogen from liquid organic hydrogen carrier (LOHC), for its eventual use on-board of ships (with hydrogen-fuelled engines). The reactor will be designed according to the specificity and requirements of the LOHC dehydrogenation chemical reaction, i.e. a slow endothermic ...

Numerical simulation of expanding swirling flows with a hybrid RANS/LES turbulence model Ghent University

Erik Dick

Department of Flow, heat and combustion mechanics

Vortex precession and vortex breakdown in swirling abruptly expanding jets are simulated with a hybrid RANS-LES turbulence model. In the core of the flow, coarse grid LES is used with an e-model as subgrid model (1 dynamic euation). In wall vicinity, the same model is used as RANS model with a mixed low Reynolds number and wall function description.

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