Phd Position F/m Model Reduction of Turbulence - Talence, France - Inria

Inria

Entreprise vérifiée

Talence, France

il y a 1 semaine

Posté par:

Sophie Dupont

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Description

Le descriptif de l'offre ci-dessous est en Anglais_

Type de contrat :

CDD

Niveau de diplôme exigé :
Bac + 5 ou équivalent

Fonction :
Doctorant

Niveau d'expérience souhaité :
Jeune diplômé

A propos du centre ou de la direction fonctionnelle:

The Inria center at the University of Bordeaux is one of the nine Inria centers in France and has about twenty research teams.

The Inria centre is a major and recognized player in the field of digital sciences.

It is at the heart of a rich R&D and innovation ecosystem:

highly innovative SMEs, large industrial groups, competitiveness clusters, research and higher education players, laboratories of excellence, technological research institute...

Contexte et atouts du poste:

This project is funded by the
ANR project RedLUM, in collaboration with Inrae Rennes (Dominique Heitz, Valentin Resseguier), Sant'Anna School of Advanced Studies (Giovanni Stabile), and the companies Scalian DS and Weather Measures.

The student will collaborate with the other partners of the team to ultimately devise an efficient simulation framework for agricultural frost control involving wind machines at an agricultural plot scale.

Keywords:
model order reduction; data assimilation; stochastic closure modeling.

Mission confiée:

Despite the many recent advances, rapid and reliable approximation of para metric high-Reynolds turbulent flows remains an outstanding task for state-of-the-art model reduction tech niques.

First, due to the slow decay of the Kolmogorov n-width, projection-based (Galerkin or Petrov-Galerkin) reduced-order models (PROMs) based on proper orthogonal decomposition (POD) need to cope with signifi cantly under-resolved representations of the solution field, which prevent accurate approximations of the full system dynamics.

Second, the chaotic nature of the system challenges the predictive abilities of state-of the-art projection methods.

To address these issues, several authors have proposed stochastic closures of PROMs:
the distinctive feature of these approaches is to approximate the deterministic chaotic dynamics through a system of stochastic ordinary differential equations for the dominant POD modes; the prediction of the solution is then obtained through a PROM ensemble forecast

Principales activités:

The aim of the project is to develop and analyze a model reduction technique for the simu lation of parametric incompressible turbulent (chaotic) flows.

The point of departure is the stochastic closure modeling procedure ; we shall consider the efficient treatment of parametric boundary condi tions and the development of efficient hyper-reduction techniques to handle nonlinear terms.

Application to large-scale three-dimensional problems will be pursued by integrating the methodology in the C++ solver Ithaca FV.

Compétences:

Background in computational fluid dynamics, statistical learning, and good programming skills will be highly valued.

Avantages:

Subsidized meals
Partial reimbursement of public transport costs
Leave: 7 weeks of annual leave + 10 extra days off due to RTT (statutory reduction in working hours) + possibility of exceptional leave (sick children, moving home, etc.)
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

Rémunération:

gross monthly salary : 2100€ (before social security charges and income tax deduction)

Informations générales:

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Thème/Domaine: Schémas et simulations numériques
Calcul Scientifique (BAP E)

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Ville: Talence

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Centre Inria: Centre Inria de l'université de Bordeaux
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Date de prise de fonction souhaitée:
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Durée de contrat: 3 ans
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Date limite pour postuler:

Consignes pour postuler:

Please send the following documents:
CV
Cover letter

Sécurité défense:

Ce poste est susceptible d'être affecté dans une zone à régime restrictif (ZRR), telle que définie dans le décret n° relatif à la protection du potentiel scientifique et technique de la nation (PPST).

L'autorisation d'accès à une zone est délivrée par le chef d'établissement, après avis ministériel favorable, tel que défini dans l'arrêté du 03 juillet 2012, relatif à la PPST.

Un avis ministériel défavorable pour un poste affecté dans une ZRR aurait pour conséquence l'annulation du recrutement.

Politique de recrutement:

Dans le cadre de sa politique diversité, tous les postes Inria sont accessibles aux personnes en situation de handicap.

Contacts:

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Équipe Inria: MEMPHIS

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Directeur de thèse:

A propos d'Inria:

Inria est l'institut national de recherche dédié aux sciences et technologies du numérique. Il emploie 2600 personnes. Ses 215 équipes