16/02/2017
Marie Skłodowska-Curie Actions

MSCA-ITN UTOPIAE: ESR scholarship at INRIA, Uncertainty Quantification Framework for Large-Scale Unsteady Problems (ESR4)

This job offer has expired


  • ORGANISATION/COMPANY
    Inria Saclay - Ile-de-France
  • RESEARCH FIELD
    EngineeringAerospace engineering
    EngineeringSimulation engineering
    MathematicsComputational mathematics
  • RESEARCHER PROFILE
    First Stage Researcher (R1)
  • APPLICATION DEADLINE
    30/04/2017 00:00 - Europe/Athens
  • LOCATION
    Multiple locations, see work locations below.
  • TYPE OF CONTRACT
    Temporary
  • JOB STATUS
    Full-time
  • HOURS PER WEEK
    35
  • OFFER STARTING DATE
    01/10/2017
  • EU RESEARCH FRAMEWORK PROGRAMME
    H2020 / Marie Skłodowska-Curie Actions
  • MARIE CURIE GRANT AGREEMENT NUMBER
    722734

Computational Science aims at developing reliable and predictive numerical tools, relying on and mixing experiment, computation and theory. The objective is not only to numerically reproduce with high-fidelity an observed phenomenon, but also to predict the reality in situations for which the numerical tool has not been specifically validated nor tested. To this end, reliable numerical predictions require sophisticated physical models as well as a systematic and comprehensive treatment of calibration and validation procedure, including the quantification of inherent uncertainties.

Complex physical models call for simplifications that usually introduce parameters. For instance, using turbulence models instead of direct Navier-Stokes (DNS) simulations introduces some modeling constants to be calibrated or estimated. Consequently, these model parameters remains uncertain, as they can not be known exactly, and it is crucial to assess the impact of these uncertainties on future predictions. Unfortunately, increasing the number of uncertain parameters immediately translates in an increased computational cost for the uncertainty quantification (UQ), due to the so-called curse of dimensionality. The design of UQ methods should then be robust to the number of uncertain parameters, in order to remain feasible for engineering problems of interest.

Moreover, UQ methods have to be applied on top of the deterministic solvers to enable large scale applications (i.e. non-intrusively). In particular, they should take advantage of the modern computational infrastructures with massive parallelism. For instance, the possibility to solve in parallel a numerical model for different values of the uncertain parameters is routinely exploited in black-box methods. However, designing computational strategies that closely associate deterministic solution methods (for PDEs) and UQ methods appears as a promising way to reduce the computational cost of UQ problems. Indeed, although the computations for different parameter values are independent, one may found advantages in reusing information of one solve to accelerate another (e.g. recycling adapted meshes). Other possibilities include revisiting deterministic approaches, such as Domain Decomposition methods, to adapt and extend them for the UQ task. From the computational performance perspective, it is also critical to exploit structures in the uncertain parameters effects to design efficient UQ strategies. However, since these effects are usually unknown a priori, one needs to rely on dedicated procedures to adapt and revise the UQ strategy as the knowledge of the parameters impact is progressing.

The aim of the ESR is to develop original UQ algorithms and solvers to deal with complex model dependencies in high parametric dimension. As the project targets large scale simulations, High Performance Computing aspects will be a major concern in the design of UQ algorithms taking advantage of modern computational infrastructures. The ESR will work with Stanford University on the HPC framework for treating large-dimension unsteady problems, during a three-months secondment. The ESR will apply the developed framework to the design of morphing airfoil for helicopter application, during a three-months secondment at Politecnico di Milano. 

Benefits

  • Canteen and cafeteria
  • Partial coverage of the transport costs in common
  • Sport equipment

Eligibility criteria

  • Early-Stage Researchers (ESRs) shall, at the time of recruitment by the host organisation, be in  the  first  four  years  (full-time  equivalent  research  experience)  of  their  research  careers  and have not been awarded a doctoral degree.
  • All  researchers  recruited  in  an  ITN  must  be  Early-Stage  Researchers  (ESRs)  and  undertake transnational mobility (including, but not limited to secondments with other UTOPIAE partner institutions, conference attendance, outreach and engagement work and any other appropriate work requiring travel as deemed necessary by their supervisor).
  • Mobility Rule: at the time of recruitment by the host organisation, researchers must not have resided  or  carried  out  their  main  activity  (work,  studies,  etc.)   in  the  country  of  their  host organisation for more than 12 months in the 3 years immediately prior to the reference date. Compulsory national service and/or short stays such as holidays are not taken into account.

For  all  recruitment,  the  eligibility  of  the  researcher  will  be  determined  at  the  time  of  their  first recruitment  in  the  project.   The  status  of  the  researcher  will  not  evolve  over  the  life-time  of  the project.

Selection process

Applicants  should  submit  a  Curriculum  Vitae,  a  covering  letter  as  a  single  document  detailing the knowledge, skills and experience you think make you the right candidate for the job, two letters of  reference,  a  list  of  your  MSc  courses  and  grades,  copy  of  your  Master’s  thesis  and  preferably  a list of publications.

Applicants should confirm within their covering letter the length of time they have resided in the host country in the last 3 years before the 1st of October 2017.

Additional comments

The  ESR  will  be  supervised  by  P.M.  Congedo  (INRIA)  and  Olivier  Le  Maître  (CNRS),  experts in  uncertainty  quantification  methods  (see http://www.pietrocongedo.altervista.org/ and http://perso.limsi.fr/olm/).

  • Duration of the contract: 36 months
  • Monthly gross salary: 39,820.00 per year
  • Starting date: September-November 2017.

Offer Requirements

  • REQUIRED EDUCATION LEVEL
    Engineering: Master Degree or equivalent
    Mathematics: Master Degree or equivalent
  • REQUIRED LANGUAGES
    ENGLISH: Excellent

Skills/Qualifications

Candidates are required to have a Master’s degree in engineering, applied mathematics or a related discipline,  and  a  specialization  in  computational-fluid-dynamics,  uncertainty  quantification,  optimization or related fields.  Preferable qualifications for candidates include proven research talent, an excellent command of English, and good academic writing and presentation skills.

Work location(s)
1 position(s) available at
Inria
France
Palaiseau
91120
1, rue Honoré d'Estienne d'Orves
1 position(s) available at
Inria
United States
Stanford
1 position(s) available at
Inria
Italy
Milano

EURAXESS offer ID: 182044