Post-doctoral researcher - High-order methods for high speed flows (R2)

Job Reference

342_20_CASE_LCFD_R2

Position

Post-doctoral researcher - High-order methods for high speed flows (R2)

Closing Date

Wednesday, 16 December, 2020
Reference: 342_20_CASE_LCFD_R2
Job title: Post-doctoral researcher - High-order methods for high speed flows (R2)

About BSC

The Barcelona Supercomputing Center - Centro Nacional de Supercomputación (BSC-CNS) is the leading supercomputing center in Spain. It houses MareNostrum, one of the most powerful supercomputers in Europe, and is a hosting member of the PRACE European distributed supercomputing infrastructure. The mission of BSC is to research, develop and manage information technologies in order to facilitate scientific progress. BSC combines HPC service provision and R&D into both computer and computational science (life, earth and engineering sciences) under one roof, and currently has over 650 staff from 49 countries.

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Context And Mission

This position will work as a post-doctoral researcher in the European project NextSim. The backbone of NextSim is centred on the fact that, today, the capabilities of leading-edge emerging HPC architectures are not fully exploited by industrial simulation tools. Given the expertise of the partners, we will focus on aeronautical problems, but this upstream research can be applied to a variety of industries, some of them mentioned above, where the models used for design rely on the numerical discretization and integration of partial differential equations (e.g. automotive, wind energy, etc.). Current state-of-the-art industrial solvers do not take sufficient advantage of the immense capabilities of new hardware architectures, such as streaming processors or many-core platforms. The computing world has changed over recent years, with processor clock speeds no longer increasing, and multicore/heterogeneous platforms now dominating. A combined research effort focusing on algorithms and HPC is the only way to make possible to develop and advance simulation tools in order to meet the needs of the European aeronautical industry.

NextSim will focus on the development of the numerical flow solver CODA. The CODA solver includes classic finite volume capabilities and new highly accurate high order discontinuous Galerkin schemes, all specifically tailored for aeronautical applications, and available to all partners. The CODA solver will be the new reference solver for aerodynamic applications inside AIRBUS group (including aircraft and helicopters), as such, it will be used by AIRBUS group (including Civil, Helicopters, Space, Military) for the design of a variety of engineering applications, having a significant impact in the aeronautical market.
And, to facilitate the transfer of knowledge to the wider simulations community, the developments of CODA in NextSim will be made available through mini-apps (simple feature specific solvers) and the various existing open source solvers of the partners (such as Alya at BSC, Horses3D at UPM or Aghora at ONERA), widening the access to codes and fostering transfer of know-how to user communities.

To turn CODA into the future aerodynamic industrial solver, NextSim defines the following objectives:

1.) Re-engineer industrial aerodynamic solver CODA for the efficient use of parallel heterogeneous HPC-petascale architectures available now.
2.) Improve the convergence of current numerical algorithms for heterogeneous HPC systems that may comprise many-core and GP-GPU. Whatever the numerical approach used (Finite Volume, FV, of High Order Methods, HoM) and the number and complexity of the partial differential equations (PDE) considered: Reynolds Averaged Navier Stokes equations (RANS) or Turbulent Scales Resolving Simulations (TSRS).
3.) Appropriate for adaptive simulations for which the number of DoF evolves during the iterative process while solving the system of PDE, e.g. in the perspective of h/p adaptation. This includes appropriate static and dynamic load balancing strategies
4.) Portable and versatile versus various types of HPC hardware.
5.) Bring the HoM technology to the same level of maturity, robustness and computational efficiency than FV to envisage its deployment in operations for certain class of problem
6.) Overcome barriers to achieving extreme scale computing by choosing the appropriate programming model; replacing synchronous with asynchronous communication; using parallelism at many levels: from the instruction set at the functional unit level, to large grain processes at the multi-node scale; improving energy efficiency.
7.) Solve a series of market aeronautical test cases but currently unfeasible because of their computational costs, and perform a comparison of the “before and after” simulation time and accuracy.
8.) Disseminate the project results through the “mini-Apps” idea, (see details below) or kernels for numerical simulation that will be open source, enabling researchers and firms external to the project to benefit quickly from any innovations.
9.) Integrating the user in the NextSim evolution. NextSim can only be successful and sustainable if the stakeholders in the consortium and potential consumers of the centre’s services are involved, get informed and can provide feedback in an adequate way.

Key Duties

  • Lead the HO activities to be carried out by BSC in NextSim
  • Interact with the different partners of NextSim to carry our collaborative research
  • Integrate low dissipation HO schemes into Alya software
  • Research in LES methods for HO solvers
  • Contribute in scientific papers publications and the reporting of NextSim to the European Commission

Requirements

  • Education
    • PhD in scale resolving methods for CFD
    • Msc in aeronautical engineering or similar
  • Essential Knowledge and Professional Experience
    • Experience developing in-house CFD codes.
    • Experience using large scale HPC facilites.
    • Experience in LES and HO methods.
  • Competences
    • Good communication skills (English)
    • Adequate physical and mathematical knowledge in the aeronautical field
    • Previous experience in European research projects and industrial projects will be considered

Conditions

  • The position will be located at BSC within the CASE Department
  • We offer a full-time contract, a good working environment, a highly stimulating environment with state-of-the-art infrastructure, flexible working hours, extensive training plan, tickets restaurant, private health insurance, fully support to the relocation procedures
  • Duration: Temporary - 3 years renewable
  • Salary: we offer a competitive salary commensurate with the qualifications and experience of the candidate and according to the cost of living in Barcelona
  • Starting date: 01/01/2021

Applications Procedure

All applications must include:

  • A Cover Letter with a statement of interest in English, including two contacts for further references - Applications without this document will not be considered

  • A full CV in English including contact details


Deadline

The vacancy will remain open until suitable candidate has been hired. Applications will be regularly reviewed and potential candidates will be contacted.

Diversity and Equal Opportunity Employment

BSC-CNS is an equal opportunity employer committed to diversity and inclusion. We are pleased to consider all qualified applicants for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or any other basis protected by applicable state or local law.
This position is reserved for candidates who meet the requirements and have the legal status of disabled persons with a degree of disability equal to or greater than 33%. In case there are no applicants with disabilities that meet the requirements, the rest of the candidates without declared disability will be evaluated.

Application Form

Please, upload your CV document using the following name structure: Name_Surname_CV
Files must be less than 3 MB.
Allowed file types: txt rtf pdf doc docx.
Please, upload your CV document using the following name structure: Name_Surname_CoverLetter
Files must be less than 3 MB.
Allowed file types: txt rtf pdf doc docx zip.
Please, upload your CV document using the following name structure: Name_Surname_OtherDocument
Files must be less than 10 MB.
Allowed file types: txt rtf pdf doc docx rar tar zip.
** Consider that the information provided in relation to gender and nationality will be used solely for statistical purposes.