Position details

LES of explosions in semi-confined domains
Training › Computational Fluid Dynamics - Combustion

Required Education / Niveau requis

Master

From / Date de début

February-April 2013

Duration / Durée

6 months

Context / Contexte

Accidents due to gas explosion in industrial buildings are a major safety issue. Understanding the mechanisms controlling explosions in buildings, typically in offshore platforms, is an economical and physical challenge. Gas explosions are typically studied in confined or semi-confined vessels with obstacles where a premixed flame is ignited. The propagation of the flame and the resulting over-pressure are the key parameters which define safety concepts and guidelines for explosion protection. Thanks to the growing computational power, Computational Fluid Dynamic (CFD) appears as an alternative to experiments, which remain expensive and dangerous. Codes based on the Unsteady Reynolds Averaged Navier-Stokes (URANS) approach are standard for gas explosion studies at industrial scales but they rely on crude parametrizations. The recent emergence of LES (Large Eddy Simulation) in the field of turbulent combustion opens new perspectives to make explosion simulations truly quantitative.

Description / Description

The trainee will have to learn LES and combustion with CERFACS researchers and will be responsible for the numerical simulations of explosions in collaboration with TOTAL. The target configurations for the study range from small-scale laboratory experiments [1-2] to real-scale experiments, which are currently underway. Computations will be performed with the LES solver AVBP developped by CERFACS (http://www.cerfacs.fr/4-26334-The-AVBP-code.php) [3].

Références :

[1] Kent, J., Masri, A., Starner, S., Ibrahim, S., 5th Asia-Pacific Conf. Combust. , Adelaide, Australia (2005).

[2] Gubba, S., Ibrahim, S., Malalasekera, W., Masri, A., Combust. Sci. Tech. 180(10):1936–1955 (2008).

[3] Gourdain, N., Gicquel, L., Montagnac, M., Vermorel, O., Gazaix, M., Staffelbach, G., Garcia, M., Boussuge, J., Poinsot, T., Comput. Science & Discov. 2:015003 (2009).

Contacts / Contacts

Name: Vermorel Olivier
Phone: +33 (0)5 61 19 30 33
Fax: +33 (0)5 61 19 30 30
Email: vermorel@cerfacs.fr

Name: Poinsot Thierry
Phone: +33(0)5.61.19.30.34
Fax: +33(0)5.61.19.30.00
Email: poinsot@cerfacs.fr

Salary / Rémunération

580 Euros/month