Safety Relevant Ignition Processes

Projects > Project 6

DNS of ignition probability


2D decomposition for parallel* computations in DINOSOARS

The conditions requested to obtain a successful autoignition in a turbulent gas mixture have been mostly investigated in the past through experiments or highly simplified models. A quantitative numerical investigation requires an excellent description of the turbulent flow coupled to an accurate representation of all relevant chemical, diffusive and thermodynamic processes. This leads to extremely high requirements in terms of computing time, preventing any practical use for safety analysis up to now. There is therefore an obvious need to pursue such investigations, including the development of suitable reduced models. This is realized in the present project based on Direct Numerical Simulation with exact physicochemical models. In order to cover a wide range of safety-relevant auto-ignition, different reaction mixtures (H2/air and C2H4/air) and different flame structures will be investigated (homogenous, spherical, jet, etc...).

Our team will work with a multi-dimensional in-house DNS code (DINOSOARS) during the current phase of the project. DINOSOARS (DIrect Numerical, high-Order Simulation and On-the-fly Analysis of Reacting flows and Sprays) is a new Fortran-2003 code which is developed in our group since the beginning of 2013. DINOSOARS is three dimensional, uses a 6th order finite difference spatial discretization and low Mach number solver for reacting and multi-phase turbulent flows. The code is parallelized in two dimensions using 2DECOMP&FFT library on top of standard MPI and FFTW. Also, 3rd and 4th order Runge-Kutta implicit time integration schemes are used for stiff chemistry part in the governing equations, in order to increase the integration time step.

References

Articles:

11.
Abouelmagd Abdelsamie and Changhoon Lee
Phys. Fluids 25, 033303 (2013)
10.
Abouelmagd Abdelsamie and Changhoon Lee
Phys. Fluids 24, 015106 (2012)
9.
Gordon Fru, Gabor Janiga and Dominique Thevenin
Flow Turbul. Combust. 88, 451-478 (2012)
8.
Gordon Fru, Gabor Janiga and Dominique Thevenin
J. Combust. 746719, 1-12 (2011)
7.
Gordon Fru, Dominique Thevenin and Gabor Janiga
Energies 4 (6), 878-893 (2011)
6.
Hemdand Shalaby and Dominique Thevenin
Flow Turbulence Combust. 84 (3), 357-367 (2010)

Conferences:

5.
Gordon Fru and Dominique Thevenin
In J. Fröhlich, editor, Direct and Large-Eddy Simulation IX
Publisher: Springer,
2013
4.
Abouelmagd Abdelsamie and Dominique Thevenin
In J. Fröhlich, editor, Direct and Large-Eddy Simulation IX
Publisher: Springer,
2013
3.
Abouelmagd Abdelsamie, Thirumalesha Chittipotula and Dominique Thevenin
the International Conference on Multiphase Flows
2013
2.
Abouelmagd Abdelsamie and Dominique Thevenin
Joint EUROMECH / ERCOFTAC Colloquium 549, “Immersed Boundary Methods: Current Status and Future Research Directions”
2013
1.
Gordon Fru, Gabor Janiga and Dominique Thevenin
Proc. 13th International Conference on Numerical Combustion
2011
Export as:
BibTeX, XML

Related Websites

*(2Decomp&FFT-lib) Opens external link in new windowhttp://www.2decomp.org/