PhD in Mechanical Engineering: Subgrid-scale modeling of thermo-diffusive instabilities in Large Eddy Simulation of turbulent hydrogen combustion

26 Jan 2024
Job Information

Organisation/Company

IFP Energies nouvelles (IFPEN)

Research Field

Engineering » Mechanical engineering

Researcher Profile

First Stage Researcher (R1)

Country

France

Application Deadline

14 Jul 2024 - 23:59 (Europe/Paris)

Type of Contract

Temporary

Job Status

Full-time

Hours Per Week

35

Offer Starting Date

4 Nov 2024

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

The increasing use of hydrogen (H2) in industry and transport poses problems in terms of the safety of industrial installations. Indeed, H2 is a volatile and flammable molecule which can cause destructive explosions. Computational fluid dynamics (CFD) constitutes an important tool for designing systems and is a complement to experiments, which are expensive and difficult to implement. CFD simulations must nevertheless achieve a high level of fidelity. In the case of the combustion of H2, the numerical models must in particular take into account the effects of thermo-diffusive instabilities, which are a consequence of the very high diffusivity of hydrogen, and which generate a significant acceleration of the flames. These effects are, however, rarely taken into account in CFD models, and are often based on laminar flames, while the interactions between instabilities and turbulence are neglected. The objective of this PhD is to develop a large eddy simulation model taking into account the effects of thermo-diffusive instabilities, as well as their interactions with turbulence. The model will be developed in the formalism of the thickened flame model (TFM), currently used at IFPEN. The thesis will take place according to the following steps: (i) Implementation of direct numerical simulations (DNS), making it possible to understand and acquire detailed data on the interactions between instabilities and turbulence; (ii) development of a model in a TFM context and validation on canonical cases; (iii) test of the model on a practical case of industrial explosion.

Keywords: Hydrogen; Safety; Combustion; Thermo-diffusive instabilities; CFD

Academic supervisor: Dr. Olivier COLIN, IFPEN, ORCID : 0000-0002-8947-3490

Doctoral School: ED579 SMEMAG

IFPEN supervisor: Dr. Cédric MEHL, ORCID : 0000-0003-2293-9281

Requirements

Research Field

Engineering » Mechanical engineering

Education Level

Master Degree or equivalent

Skills/Qualifications

Master's degree in Computational Fluid Dynamics

Specific Requirements

Knowledges: Numerical modelling, Fluid Mechanics

Programming languages: C++, Python

Languages

ENGLISH

Level

Excellent

Additional Information
Benefits

IFP Energies nouvelles is a French public-sector research, innovation and training center. Its mission is to develop efficient, economical, clean and sustainable technologies in the fields of energy, transport and the environment. For more information, see our WEB site .

IFPEN offers a stimulating research environment, with access to first in class laboratory infrastructures and computing facilities. IFPEN offers competitive salary and benefits packages. All PhD students have access to dedicated seminars and training sessions.

Work Location(s)

Number of offers available

1

Company/Institute

IFP Energies nouvelles

Country

France

City

Rueil-Malmaison

Postal Code

92852

Geofield

Where to apply

E-mail

[email protected]

Contact

City

Rueil-Malmaison

Website

http://www.ifpenergiesnouvelles.com/

Street

4 avenue de Bois-Préau

Postal Code

92852

STATUS: EXPIRED