Research scientist in mesoscopic physics and multiphysics couplings

Research scientist in mesoscopic physics and multiphysics couplings

Open permanent position at the Laboratory for microstructural investigation (UMR LEM ONERA-CNRS, Châtillon, France)


In the vast majority of cases, used metallic materials are heterogeneous: their behavior is controlled by the presence of different phases (precipitates, inclusions …) and various defects (vacancies, dislocations, microcracks, microcavities …). These objects and their evolution are controlled by forces that act at the atomic scale but whose effects take place at macroscopic scales of time and space that are beyond the capabilities of atomic simulations. One solution to overcome this difficulty is to develop mesoscopic models that operate at an intermediate scale that lies between the atomic and macroscopic scales.

At this scale, at which microstructure is resolved, a continuous description of the physics emerges: the initially discrete degrees of freedom are replaced by continuous fields. Relevant fields, their evolution equations, as well as the multiphysics couplings that link them have to be identified. The control of the mesoscopic scale is a prerequisite before establishing a link with the macroscopic scale. For this, several bricks must be consolidated (continuous plasticity models, fractures, damage…) and other extended (formulation of phase field methods, extensions for multiphysics couplings …). This requires specific skills (solid state physics, statistical physics, non-equilibrium thermodynamics, properties/behaviour of materials, numerical methods) mastered by a researcher capable of formulating new models.


At the Laboratory for microstructural investigation (LEM), your activities will consist in:

  • Conducting fundamental research on the formulation and development of physically justified methods at the mesoscopic scale of the microstructure;
  • Implementing different formalisms and tools involving transition approach in space and time (discrete to continuous, microscopic to mesoscopic, mesoscopic to macroscopic transitions) and multiphysics couplings;
  • Developing national and international scientific collaborations;
  • Writing scientific publications and participating in national and international conferences;
  • Supervising PhD students and post-doctoral fellows;
  • Promoting the activities of the “Microstructures: morphology, plasticity and transport” research axis of the laboratory and the links with the Materials and Structures Department (DMAS) teams of ONERA who develop tools at the macroscopic scale.



  • Holder of a PhD;
  • Solid knowledge in theoretical physics, materials physics, equilibrium and non-equilibrium thermodynamics, mechanical on discrete and continuous scales;
  • Expertise in numerical methods for modelling;
  • Solid knowledge in applied mathematics (spectral methods, partial differential equations, tensor algebra…) would be appreciated;
  • Fluency in English (read, written and spoken).



Within the Materials and structures department of ONERA, the Laboratory for microstructural investigations (LEM) is a joint research unit (UMR) between ONERA and the CNRS located close to Paris (France) bringing together around thirty researchers, engineers, doctoral students and postdoctoral fellows.

The laboratory conducts fundamental studies in condensed matter physics with an approach that combines theoretical developments, advanced in modelling, synthesis and characterization of materials and nanomaterials around two research axes: the “Microstructures: morphology, plasticity and transport” axis aims to predict the genesis and evolution of microstructures resulting from phase transformations at the atomic, microscopic, and mesoscopic scales and to develop models and numerical simulations of the plasticity of materials in order to predict their deformation at the macroscopic scale. The “Low dimensional structures” axis aims to understand and control the synthesis of nanomaterials, and to study the effects of coupling and enhancement of their electronic properties caused by downsizing (



Among ONERA’s seven Scientific Departments, the Materials and Structures Department (DMAS) is responsible for meeting expectations, anticipating needs and providing expertise to industrial companies in the fields of aeronautics, defense and space in terms of materials and structures. The scientific activities of the Department range from the atom to the structure, and relate to all types of aeronautical materials (metallic, composite, ceramic). The Department has about 120 permanent staff and around fifty doctoral students. His research units are located in Châtillon, Palaiseau and Lille, France (


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



ONERA permanent position

job : Permanent position (Permanent position)

Location : ONERA Chatillon

Expertise: Solid knowledge in theoretical physics, materials physics, equilibrium and non-equilibrium thermodynamics, mechanical on discrete and continuous scales; Expertise in numerical methods for modelling; Solid knowledge in applied mathematics.

Academic degree : PhD degree

Contacts : Mathieu Févre, Yann Le Bouar (Email Us)


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