Post-doc « Thermal dispersion of a granular medium: application to innovative road materials »

MISE EN LIGNE : | DATE DE CLÔTURE : Indéfinie Niveaux Doctorat Offre d'emploi temporaire (CDD) et stages Localisation Nantes

Fiche de poste

Title

    Thermal dispersion of a granular medium: application to innovative road materials

Information

  • Job type: Post-doc position
  • Contract duration (months): 12
  • Qualifications: PhD in applied physics (thermal, energy, chemical or materials engineering)
  • Job hours: Full time
  • Employer: IFSTTAR
  • Host-laboratory: Laboratoire GPEM
  • Adress host-laboratory: Allée des Ponts et Chaussées, Bâtiment Féret, CS4, 44344 Bouguenais, France
  • Application deadline: August 20th 2019
  • Starting job: Before October 1st 2019

Job description

The post-doc position is integrated in the I-Street project funded by ADEME. The bitumen binders stored as packing granular product at ambient temperature seems very promising for road industry creating healthy work environment while decreasing energy impact. By considering the energy cost equal to 400 MJ the ton of the produced asphalt materials, the energy cost between the USA (~4 MTep) and Europe (~ 2.83 MTep) corresponding to about 0.15% of the world's annual oil production. Currently, the road materials are produced in a mixing plant to get a viscoelastic materials at a temperature ranged between 90 ° C and 160 ° C. Primarily, the bituminous binder is maintained into a tank at a temperature near of its melting point (~100°C) before to be introduced in the mixing process. In that temperature range, the rheological behavior of Newtonian type is valuable for the coating of the aggregates from the bituminous binder.

The influence of the mixing process between a bituminous binder stored as packing granular product and the hot materials would result on a partial final coating constituting the main barrier of that innovation. This last point is related to the mixing, melting and diffusion issues. In that context, the work of the post-doctoral fellow will be mainly devoted to the characterization of the thermal dispersion of a granular medium thermally segregated at the initial state.

The candidate should be based on modeling tools of continuous and/or discrete type to carry out co-simulation works in order to reduce computation time. The work of the post-doctoral fellow will be mainly devoted to simulation and numerical modelling, which will focus more specially on:

  1. The assessment of the kinematics of the multiphasic system representative of the processes. As a first approximation, monodisperse spherical grains at ambient temperature will be chosen in a model geometry containing a bed of materials at manufacturing temperature.
  2. The numerical simulations to characterize the thermal homogenization time of granular materials by considering their thermophysical parameters in an elementary volume representative of the studied system.
  3. Prepare the implementation of a suitable continuous physical model

Supervisors

Florian Huchet (Dr. HdR) will be the supervisor. florian.huchet(at)ifsttar.fr

Lauredan Leguen (Dr.) will ensure the follow up concerning modeling work at different scales. lauredan.leguen(at)ifsttar.fr

Candidate profil

Experience in the fields of fluids mechanics and granular materials. Interest in the heat and mass transfer modeling. Strong written and oral communication skills.

Application

You wish to apply for this post-doc position.

Please send the following documents (all in one PDF file) by e-mail to florian.huchet(at)ifsttar.fr before august 20th 2019:

  1. For EU candidates: Copy of your national ID card or your passport page where your photo is printed. For non-Eu candidates: Copy of your passport page where your photo is printed
  2. Curriculum Vitae (may include hyperlinks to your ResearchID, Researchgate, Google Scholar accounts).
  3. Detailed list of publications (may include hyperlinks to DOI of publications).
  4. Letter of motivation relatively to the position (Cover Letter) in which applicants describe themselves and their contributions to previous research projects (maximum 2 pages)
  5. Copy of your PhD degree if already available.
  6. Coordinates of references professors (maximum 3)