Company Details

ONERA, a central player in aeronautical and space research, prepares the defense of tomorrow, responds to the aeronautical and space challenges of the future, and contributes to the competitiveness of the aerospace industry.

Presentation of ONERA

ONERA, a central player in aeronautical and space research, employs more than 2,000 people. Placed under the supervision of the Ministry of the Armed Forces, it has a budget of 266 million euros (2022), more than half of which comes from study, research and test contracts. State expert, ONERA prepares the defense of tomorrow, responds to the aeronautical and space challenges of the future, and contributes to the competitiveness of the aerospace industry. He masters all the disciplines and technologies in the field. All the major civil and military aerospace programs in France and Europe carry part of ONERA’s DNA: Ariane, Airbus, Falcon, Rafale, missiles, helicopters, engines, radars, etc. Recognized internationally and often awarded, its researchers train many doctoral students.

Presentation of the department

The Multi-Physics for Energetics department carries out research and studies for the benefit of industrialists and state services in the aerospace field, both civil and military, but also in close connection with the academic world. The Department’s activities are divided into six strategic areas: Innovative energy systems; The performance of the propulsion systems; Experimentation under representative conditions; Multi-physics modeling and simulation; Safety and environmental impact; Multi-physics software platforms.


In the Multi-Physics Department for Energy (DMPE), the Multiphysics Software Platform (PLM) unit is in charge of developing the CEDRE code (multi-solvers, MPI parallel, unstructured meshes) dedicated to multi- physics in the field of energy. The CEDRE code attempts to solve compressible, reactive, single-phase and two-phase flows. For aerospace studies, “dispersed phase” two-phase flows are predominant in combustion chambers and specific Eulerian and Lagrangian solvers have been developed and tested. In addition, over the last ten years, simulations increasingly include two-phase flows with “separate phases”, for which the interface between the fluids must be resolved. For it,

You participate in the development of physical modeling and finite volume type numerical methods, with the aim of improving the precision and robustness of multifluid simulations carried out with CEDRE. Due to the nature of the two-phase flows encountered, the development of precise and robust diagrams is indeed a real challenge and remains a subject of research that is still very open.

In collaboration with other developers, you contribute to the enhancement of the CEDRE code by allowing the use of multifluid models in an industrial context. For this, you may be required to develop various functionalities facilitating the implementation of the code, which you will ensure the distribution and support to internal and external users. You will also be likely to carry out numerical simulations implementing the multifluid models developed (validation cases, demonstration simulations, contractual studies, etc.).

In addition, you are also in contact with the academic world with the supervision of students and the promotion of your research through publications in journals and communications at international conferences.

Your main tasks:

  • Develop physical modeling and finite volume type numerical methods suitable for two-phase flows;
  • Perform software development and model valuation tasks in CEDRE;
  • Communicate, exchange and interact with users and developers around the CEDRE project;
  • Participate in meetings with state and industrial partners;
  • Participate in scientific animation around the theme of digital diphasic at ONERA, through the proposal of projects and/or the supervision of internships and theses.


  • PhD in Computational Fluid Mechanics
  • Proven mastery of finite volume type numerical methods and numerical modeling of two-phase flows
  • Successful experience appreciated in the software implementation of large computer codes, particularly in the Fortran language
  • Abilities and taste for teamwork
  • Good command of English

Joining ONERA means joining the leading player in aeronautics and space research in France, it means building the future now, it means innovating every day in a cutting-edge sector.

At ONERA, you will find a balance between professional life and personal life and an environment that promotes the continuous training of employees.

Our company is committed to a policy in favor of the integration and continued employment of people with disabilities.

Tagged as: mathematical and physical modeling, multifluid models, model valuation, Computational Fluid Mechanics

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