General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DES-24-0036
Thesis topic details
Category
Engineering science
Thesis topics
Numerical simulation with Front Tracking of a Taylor bubble
Contract
Thèse
Job description
Two-phase flows can develop in industrial systems ranging from nuclear reactors to chemical processes. The presence of two phases (a liquid and its vapour, two liquids, a liquid and a gas) can be sought or constrained depending on the case. In a steam generator, bubbles are bound to form and grow before the liquid is completely vaporised. In the primary circuit of a reactor, steam slugs can appear in incidental or accidental situations. We want to study these steam slugs using numerical simulation to model them. The effect of the slug is primarily the reduction of the mass flow in the pipe. It can also have an effect on the mixing of the liquid and therefore on the temperature.
Our simulation software (TrioCFD) allows to perforum two-phase simulations with an interface tracking method. We want to simulate the dynamics of a vapour slug (sometimes called a Taylor bubble) in order to gain a better understanding of the flow dynamics. The first application of the simulations will be to evaluate the experimental correlations of pressure losses with our results and possibly enrich them. We would also like to observe the effects of geometry (cylindrical tube or rectangular channel). The work will involve setting up simulations based on existing functional cases, analysing the results and proposing modelling approaches.
University / doctoral school
Ingénierie - Matériaux - Environnement - Energétique - Procédés - Production (IMEP2)
Grenoble INP
Thesis topic location
Site
Saclay
Requester
Position start date
01/10/2024
Person to be contacted by the applicant
BURLOT Alan alan.burlot@cea.fr
CEA
DES/DM2S/STMF/LMSF
CEA Paris-Saclay
Bâtiment 451 - Pièce 13
27678
Tutor / Responsible thesis director
Machicoane Nathanaël nathanael.machicoane@univ-grenoble-alpes.fr
Laboratoire des écoulements géophysiques et industriels
Laboratoire des écoulements géophysiques et industriels
1209 Rue de la Piscine
38610 Gières
En savoir plus
https://scholar.google.fr/citations?user=a3FNWU0AAAAJ&hl=fr
https://triocfd.cea.fr/