Statistics – Computation
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543012p&link_type=abstract
American Astronomical Society, AAS Meeting #215, #430.12; Bulletin of the American Astronomical Society, Vol. 42, p.357
Statistics
Computation
Scientific paper
Interaction of flames with turbulence occurs in systems ranging from chemical flames on Earth to thermonuclear burning fronts, which are presently believed to be the key component of the explosion mechanism powering the type Ia supernovae. A number of important questions remains concerning the dynamics of turbulent flames in the presence of high-speed turbulence, the flame structure and stability, as well as the ability of the turbulent cascade to penetrate and disrupt the flame creating the distributed mode of burning.
We present results of a systematic study of the dynamics and properties of turbulent flames formed under the action of high-speed turbulence using a simplified one-step kinetics similar to the one used to describe hydrogen combustion. This approach makes large-scale highly resolved simulations computationally feasible and it allows one to focus on the process of the turbulence-flame interaction in a simplified controlled setting.
Numerical simulations were performed using the massively parallel reactive-flow code Athena-RFX. We discuss global properties of the turbulent flame in this regime (flame width, speed, etc.) and the internal structure of the flame brush. A method is presented for directly reconstructing the internal flame structure and it is shown that correct characterization of the flame regime can be very sensitive to the proper choice of the diagnostic method. We discuss the ability of the turbulent cascade to penetrate the internal flame structure. Finally, we also consider the processes that determine the turbulent burning velocity and identify two distinct regimes of flame evolution.
This work was supported in part by the National Research Council, Naval Research Laboratory, and the Office of Naval Research, and by the National Science Foundation through the TeraGrid resources.
Oran Elaine S.
Poludnenko Alexei Y.
No associations
LandOfFree
The Interaction of High-Speed Turbulence with Flames does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Interaction of High-Speed Turbulence with Flames, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Interaction of High-Speed Turbulence with Flames will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-967860