Post-Doctoral Research Visit F/M (BMI 2022) SIMULATION TOOL FOR MARINE RENEWABLE ENERGY

2023-05719 - Post-Doctoral Research Visit F/M (BMI 2022) SIMULATION TOOL FOR MARINE RENEWABLE ENERGY

Level of qualifications required : PhD or equivalent

Fonction : Post-Doctoral Research Visit

About the research centre or Inria department

From PDEs to certified computational models : this is the motto of CARDAMOM . We aim at providing a robust model development methodology, as well as a quantitative approach to model certication, allowing to assess the robustness of the model w.r.t. each of its components (equations, numerical methods, etc), and to assess the variability of the outputs w.r.t. random variations of the data.

We will achieve this objective working toward a unified set of tools for the engineering analysis of complex flows involving moving fronts. Examples of such flows be found in civil, industrial, and aerospace engineering : industrial hazards (explosions), free surface hydraulics (coastal hydrodynamics, floods, etc), energy conversion facilities (gas-vapour, liquid-vapour systems, wave energy conversion, etc.), space-reentry (chemically reacting fronts, ablating walls, rarefied/continuous flows), wing de anti-icing systems (ice-air flow), etc.

Simulating, optimising, and controlling these systems in a robust manner is far from being a simple task, especially in a real life. There is still a large number of open scientic challenges. These are related to the intrinsic nature of these flows necessitating:

an approppriate PDE formulation taking into account the physics relevant to the engineering applciations while remaining computationally affordable in an operational context;

efficient adaptive discretizations allowing to optimize the computational effort, while providing a sharp and accurate resolution of the physics;

a certification step quantifying the uncertainty in engineering oputputs due to all modelling choices, both physical, and mathematical (continuous and discrete)

To develop a robust and accurate model means to be able to quantify and control the effects of the choices made in each of the above steps. The development of robust models taylored to the applications mentione above is the objective of CARDAMOM.

Context

In this project, we aim to develop a shallow water model interacting with floating body structures. The objective is to develop a numerical tool capable of simulating the flows around complex energy converters in order to estimate their productivity in a real context and to optimize them.

Assignment

Assignments : Up to now, the fluid/structure interactions are treated in the case of stationnary structures 1. The post-doctoral fellow will be in charge of the coupling of the strategy with the solid body dynamic sofware Chrono 2. A particular attention will be taken to the energy estimate of the numerical resolution. In a second time, high order strategy will be considered. In particular, the description of the shape of the floating object requires improved methods to preserve the order of the scheme, as the embedded boudary methods 3.

1 E. Godlewski, M. Parisot, J. Sainte-Marie, F. Wahl. Congested shallow water model: roof modelling in free surface flow. ESAIM: Mathematical Modelling and Numerical Analysis, EDP Sciences, 2018, 52 (5), pp.1679 - 1707. ⟨10.1051/m2an/2018032⟩

2 Projet Chrono - An Open Source Multi-physics Simulation Engine (https: // projectchrono.org/)

3 L. Nouveau, M. Ricchiuto, G. Scovazzi. High-Order Gradients with the Shifted Boundary Method: An Embedded Enriched Mixed Formulation for Elliptic PDEs. Journal of Computational Physics , Elsevier, 2019, pp.108898. ⟨10.1016/j.jcp.2019.108898⟩

Main activities

Main activities:

literature reading.

coupling the fluid (AEROSOL/UHAINA) and solid (CHRONO) dynamic softwares

Design and analysis of a high order embedded boundary method for the fluid/structure interactions interface.

Implementation and numerical validation in 2D.

Skills

Technical skills and level required :

Advanced knowledge in computer sciences (hyperbolic scheme, high order methods, ...)

Knowledfe in scientific language (C++)

Good communication skills, especially in English for reading/writing

Benefits package

Subsidized meals

Partial reimbursement of public transport costs

Possibility of teleworking and flexible organization of working hours

Professional equipment available (videoconferencing, loan of computer equipment, etc.)

Social, cultural and sports events and activities

Access to vocational training

Social security coverage

Remuneration

2746€ / month (before taxs)

General Information

Theme/Domain : Numerical schemes and simulations Scientific computing (BAP E)

Town/city : Talence

Inria Center : Centre Inria de l'université de Bordeaux

Starting date : 2023-04-01

Duration of contract : 2 years

Deadline to apply : 2023-01-31

Contacts

Inria Team : CARDAMOM

Recruiter : Parisot Martin / [email protected]

About Inria

Inria is the French national research institute dedicated to digital science and technology. It employs 2,600 people. Its 200 agile project teams, generally run jointly with academic partners, include more than 3,500 scientists and engineers working to meet the challenges of digital technology, often at the interface with other disciplines. The Institute also employs numerous talents in over forty different professions. 900 research support staff contribute to the preparation and development of scientific and entrepreneurial projects that have a worldwide impact.

Instruction to apply

Thank you to send: - CV - Cover letter - Support letters (mandatory) - List of publication

Defence Security : This position is likely to be situated in a restricted area (ZRR), as defined in Decree No. 2011-1425 relating to the protection of national scientific and technical potential (PPST).Authorisation to enter an area is granted by the director of the unit, following a favourable Ministerial decision, as defined in the decree of 3 July 2012 relating to the PPST. An unfavourable Ministerial decision in respect of a position situated in a ZRR would result in the cancellation of the appointment.

Recruitment Policy : As part of its diversity policy, all Inria positions are accessible to people with disabilities.

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