Vous êtes ici : GDR - Version française > Annonces > Thèses et Post-docs

Appel à candidatures | Recherche, Emploi

Postdoc High Performance Computing of complex turbulent flows: application to hydraulic turbines - LEGI, Grenoble (France)

Du 1 mars 2019 au 31 décembre 2019

The position is available immediately
LEGI, Grenoble, France

For further information, please contact
Guillaume Balarac : guillaume.balarac@grenoble-inp.fr

The project consists in the development and the numerical implementation of suitable turbulence modelling techniques to allow accurate unsteady complex flow simulations in hydraulic turbine components. The present study will take place in the MOST research team, internationally known for its work in the field of numerical simulation of turbulent flows. The candidate will have access to the local, French (GENCI) and European (PRACE) computational centers. Moreover, this project will be conducted in close collaboration with the Center Of Excellence (COE) in Hydraulic of General Electric Renewable Energy, located in Grenoble. The position is available immediately.

Postdoctoral fellowship

(Available immediately)

High Performance Computing of complex turbulent flows: application to hydraulic turbines

 

Research center: The Laboratory of Geophysical and Industrial Flows (LEGI)

Location: Grenoble, FRANCE

Research team: Modelling and Simulation of Turbulence (MOST)

Contact: 

Guillaume Balarac 

guillaume.balarac@grenoble-inp.fr

Collaborations: 

Salary: 30,000 € /year.

Duration: 12 months (renewable)

Context 

Nowadays, hydro-electric turbines have to operate in totally new regimes due to the massive introduction of intermittent renewable energy sources into the grid. When the turbine operates in these non-conventional regimes, several unsteady three- dimensional hydrodynamic instabilities may appear such as vortex ropes, inter blade vortices, flow dynamic in the draft tube... For a proper flow modelling, it is therefore compulsory to reach a better understanding of the flow dynamics complexity. 

These three-dimensional phenomena can be effectively studied through numerical simulation. However, traditional simulation techniques fail to accurately predict these strongly unsteady regimes. The ultimate goal of the present study is then to perform three-dimensional unsteady numerical flow simulations in a full hydraulic turbine. Furthermore, the computing cost of these simulations has to remain moderate enough to make possible their routine use by engineers for design purposes. 

The present study will take place in the MOST research team, internationally known for its work in the field of numerical simulation of turbulent flows. The candidate will have access to the local, French (GENCI) and European (PRACE) computational centers. Moreover, this project will be conducted in close collaboration with the Center Of Excellence (COE) in Hydraulic of General Electric Renewable Energy, located in Grenoble. 

Main objectives 

The project consists in the development and the numerical implementation of suitable turbulence modelling techniques to allow accurate unsteady complex flow simulations in hydraulic turbine components. 

The MOST team is actively involved in the CNRS (French National National Scientific Research Council) joint initiative called SUCCESS (http://success.coria- cfd.fr) aimed at the promotion of super-computing in fluid mechanics. The team thus participates in the development of the YALES2 numerical code, a massively parallel solver allowing complex flow simulations in realistic industrial geometries (http://www.coria-cfd.fr/index.php/YALES2). 

The YALES2 code is specially designed to perform Large Eddy Simulations (LES) of turbulent flows. However, LES of a full hydraulic turbine are not yet feasible with the currently available computer power. The LES approach has then to be coupled with classical statistical approaches (RANS). The goal of this project is to implement this coupling technique in the YALES2 code. This work will be performed in close collaboration with the YALES2 developing team of the CORIA lab located in Rouen (France). 

Requirements 

Applicant must have a recent PhD in the field of turbulence numerical simulation preferably with industrial applications. The qualified candidates must have a record of innovative scientific accomplishments as evidenced by a paper publication in a well- recognized peer-reviewed journal. Applicants are required to include a letter of recommendation or reference.