Fluid Mechanics Design Engineer (experiments and simulations) - M/F - 6 months

AIX MARSEILLE UNIVERSITE; France; On-site; EUR 22,000 - 27,000; Full time

Job summary

Aix-Marseille Université recherche un ingénieur numérique pour soutenir un projet IUSTI CNRS/CEA-DAM sur des écoulements gaz-particles. Poste temporis, 6 mois, entrée au niveau Master, travail sur des simulations et validations expérimentales.

Le poste se déroule sur le site de Château-Gombert à Marseille, avec des études en collaboration et des campagnes expérimentales. Compétences en mécanique des fluides et programmation scientifique exigées.

Qualifications

• Master en mécanique des fluides, énergétique ou sciences computationnelles (équivalent ingénierie)
• Connaissances en mécanique des fluides et dynamique des gaz
• Programmation scientifique (Python, C++, Fortran) et environnements Linux

Responsibilities

• Développer l’aspect numérique des activités liées aux tubes d’essai : simuler des écoulements gaz-particules à deux phases et comparer avec les données expérimentales
• Participer aux campagnes expérimentales et préparer les tests (préparation, diagnostics, acquisition) pour lier expériences et calculs
• Concevoir et adapter des outils de post-traitement et analyser les résultats (Python)
• Rédiger des rapports techniques et présenter les résultats à l’équipe et aux partenaires

Skills

Fluid mechanics

Numerical methods for fluid mechanics

Scientific programming

Python

C++

Fortran

Linux environment

Education

Master Degree or engineering school qualification

Tools

Python

C++

Fortran

Job description

Organisation/Company AIX MARSEILLE UNIVERSITE Department IUSTI UMR7343 Research Field Engineering » Mechanical engineering Researcher Profile Other Profession Positions Master Positions Application Deadline 6 Nov 2026 - 18:00 (Europe/Paris) Country France Type of Contract Temporary Job Status Full-time Hours Per Week 39.10 Offer Starting Date 16 Oct 2026 Is the job funded through the EU Research Framework Programme? Not funded by a EU programme Is the Job related to staff position within a Research Infrastructure? Yes

Offer Description

JOB CONTEXT : The post is available at IUSTI (University Institute for Industrial Thermal Systems, UMR 7343), a laboratory of Aix-Marseille University and the CNRS located on the Château-Gombert site, within the shock tube platform, for a engineer (IGE) role. For the past two and a half years, IUSTI has been conducting, in collaboration with CEA-DAM (Bruyères-le-Châtel), a study of shock-induced gas-particle two-phase flows in convergent geometries. This research is based on a shock tube experimental facility (T80) dedicated to the study of isolated particles and particle beds, in both planar and convergent configurations. A new PhD thesis (2026–2029) is set to continue and expand on this work: new methods for measuring local particle concentration and tracking particles, a new piston-based test rig, and a rigorous comparison of planar and convergent configurations. Within this framework, the research engineer recruited for 6 months, at entry level (Master’s 2 level), will develop the numerical aspect of the project to support the experimental activities: comparing simulations with observations and refining the modelling of the phenomena under study.

RESPONSABILITIES : To develop the numerical aspect of activities relating to shock tubes: to simulate shock-induced gas-particle two-phase flows in planar and convergent geometries, and to compare the results with experimental data in order to interpret the observed phenomena and to validate and refine the physical models. In support of the team, he also participates in shock tube experimental campaigns (preparation and execution of tests, implementation of diagnostics, analysis of measurements) to ensure the link between experiments and calculations.

MAIN ACTIVITIES : Implement simulation tools for two-phase gas-particle flow (Euler-Lagrange-type approaches, codes developed in part by CEA-DAM) and adapt them to the configurations under study, Construct computational configurations (shock tube, planar geometry, converging chamber with curved walls) and define initial conditions based on experimental characterisations: spatial distribution of particles, compactness, initial velocity, grid curvature, Conduct parametric studies (Mach number, initial velocity and volume fraction of particles, convergence geometry), Participate in test campaigns on the T80 shock tube: preparation of particle beds, adjustment of shock conditions, conducting tests and data acquisition, Contribute to the implementation of experimental diagnostics (shadowgraphics, high-speed cameras, laser beam, pressure sensors) and their processing: image analysis, densitometry, Compare numerical results with experimental measurements (visualisations, densitometry, laser sheet) and analyse the mechanisms identified: recompaction of the particle bed, U-shaped front, three-dimensional effects, Participate in the evaluation of physical models (drag models, kinetic coupling between phases) and in the creation of a validation database, Develop post-processing and analysis tools (scripts, automation), in conjunction with experimental analysis tools, Document developments, draft technical reports and present findings to the team and partners

Requirements

Research Field Engineering » Mechanical engineering Education Level Master Degree or equivalent

Skills/Qualifications

KNOWLEDGE AND EXPERTISE : Master’s degree (Level 2) or engineering school qualification in fluid mechanics, energy engineering or computational science; entry-level candidates accepted, Fluid mechanics, compressible gas dynamics, shock waves, Basic understanding of gas-particle two-phase flows (drag, inter-phase coupling) would be an advantage, Basic understanding of instrumentation and metrology (pressure sensors, data acquisition, high-speed imaging); an interest in experimental work, Numerical methods for fluid mechanics (finite volumes, Euler-Euler and Euler-Lagrange approaches), Scientific programming (Python, C++ or Fortran), Linux environment, cluster computing, Scientific English (reading and writing)

SKILLS : Implementing and adapting simulation code for compressible and two-phase flows, Setting up a simulation case (geometry, meshing, initial and boundary conditions) based on experimental data, Conducting parametric studies, post-processing and analysing results (Python), Comparing simulations with experimental measurements and analysing discrepancies, Assist in conducting tests and set up measurement systems (sensors, high-speed cameras, data acquisition), Process and analyse experimental data (images, pressure signals) using Python, Draft technical reports and present findings, Document developments

PERSONAL QUALITIES : Independence and attention to detail, Scientific curiosity, analytical and synthesis skills, Ability to work as part of a team with experimenters, a PhD student and an external partner, Attention to detail when conducting experiments and adherence to safety regulations, Good organisational skills and ability to meet deadlines (6-month contract), Good written and oral communication skills; discretion

Languages ENGLISH Level Good

Languages FRENCH Level Basic

Research Field Engineering » Mechanical engineering Years of Research Experience None

Internal Application form(s) needed

Salary between €2,002 and €2,378 depending on experience (gross earnings)

Aix-Marseille University (AMU) is a multidisciplinary university organised around five major disciplinary sectors (Arts, Literature, Languages and Humanities; Law and Political Science; Economics and Management; Health; Science and Technology; and a multidisciplinary sector). AMU educates 80,000 students across 17 constituent units (faculties, schools, institutes), spread across four departments (04, 05, 13 and 84) and 10 towns ( find out more: www.univ-amu.fr ).

The diversity of our sites means we can now offer unique career opportunities.

Additional comments

REPORTING STRUCTURE : Reporting to the head of the IUSTI shock tube platform (Georges Jourdan, Professor), liaising with the PhD student, the experimental team and the numerical simulation teams at CEA-DAM.

SPECIFIC TERMS AND CONDITIONS OF EMPLOYEMENT : Full-time post based at IUSTI, Château-Gombert site (Marseille), within the shock tube facility, The unit is located in Restricted Access Zone. Access is strictly controlled, START DATE: 1 December 2026 or 1 January 2027, Work on experimental equipment (shock tube, pressurised gas): strict adherence to the facility’s safety guidelines, Six-month fixed-term contract, Work on computer workstations and computing resources; confidentiality of data arising from the collaboration with CEA-DAM, Occasional travel may be required (follow-up meetings with the partner, conferences)