Thesis (M/F)
New
- FTC PhD student / Offer for thesis
- 36 mounth
- BAC+5
This offer is available in English version
This offer is open to people with a document recognizing their status as a disabled worker.
Offer at a glance
The Unit
Laboratoire Interdisciplinaire Carnot de Bourgogne
Contract Type
FTC PhD student / Offer for thesis
Working hHours
Full Time
Workplace
71200 LE CREUSOT
Contract Duration
36 mounth
Date of Hire
30/09/2026
Remuneration
2300 € gross monthly
Apply Application Deadline : 21 May 2026 23:59
Job Description
Thesis Subject
CFD simulation of plasma-generating gas flow in a TIG process with a multi-pass filling configuration for assembling AISI316L components
Your Work Environment
Background:
In the TIG arc welding process, a non-consumable tungsten electrode is used. When welding with filler metal, a metal wire is fed laterally into the arc. When joining thick sections, a machined bevel must be filled. A stable arc is established by blowing a plasma-forming gas, usually argon, onto the arc. This gas is supplied through a nozzle that can be positioned at varying distances from the arc depending on the welding configuration and accessibility of the area. Depending on the welding position (e.g. overhead, fillet or vertical), the flow of the plasma-forming gas can be disrupted by the presence of the chamfer walls. The flow of the plasma-forming gas can also be altered by the filling method (one or two beads per level) and the filling level. This directly influences the energy distribution at the surface of the weld pool and thus the fluid movements within it. Therefore, this has a significant impact on the solidification of the molten metal and, consequently, on the resulting columnar grain structure in the weld bead. Therefore, it is essential to model the flow of this gas in order to control the macrostructure obtained when welding 316L stainless steel. As part of this internship, a CFD (computational fluid dynamics) simulation of the plasma gas flow during TIG welding in a bevel-filling configuration will be carried out in horizontal, flat, overhang and vertical-up positions. ANSYS Fluent software will be used for this simulation. To validate the results, an experimental model will be constructed and instrumented using strioscopic imaging (i.e. Schlieren imaging). This imaging technique allows variations in fluid density within the plasma gas flow to be visualised.
Location:
This PhD topic is offered as part of the ANR ATALANTE project, which started in April 2026. The ICB laboratory at the UBE is a partner in this project alongside the CEMEF laboratory at the École des Mines de Paris, the companies EDF and Transvalor, and the CEA. Work relating to this project and this PhD will take place at the IUT du Creusot (71200), within the LTM team of the PMDM department (Processes, Metallurgy, Sustainability and Materials).
Compensation and benefits
Compensation
2300 € gross monthly
Annual leave and RTT
44 jours
Remote Working practice and compensation
Pratique et indemnisation du TT
Transport
Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€
About the offer
| Offer reference | UMR6303-ALEMAT-004 |
|---|---|
| CN Section(s) / Research Area | Fluid and reactive environments: transport, transfer, transformation processes |
About the CNRS
The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.
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