dogs
Posts: 1
Joined: Thu Nov 01, 2007 4:16 pm

flame

Postby dogs » Thu Nov 01, 2007 4:25 pm

do flames/fire have a patern

staryl13
Former Expert
Posts: 404
Joined: Tue Sep 18, 2007 3:27 pm
Occupation: Research Assistant

Postby staryl13 » Thu Nov 01, 2007 6:05 pm

Hi!
this is an extremely broad question, it's hard to tell what you're asking. Can you please elaborate on your question, maybe then we'll be able to help you. Thanks!
"There is a single light of science, and to brighten it anywhere is to brighten it everywhere." -Isaac Asimov

SGelman
Former Expert
Posts: 29
Joined: Tue Oct 02, 2007 3:51 pm

Postby SGelman » Thu Nov 01, 2007 9:38 pm

As staryl13 said, I'm not quite sure exactly what you are testing, but maybe this will help:

http://gltrs.grc.nasa.gov/reports/2006/ ... 214057.pdf

"It is well known that solid flames do not always propagate in a uniform fashion. Rather, instabilities can develop along the flame front. Several different types of instabilities have been observed. Pulsating planar instabilities occur when there is no transverse structure to the flame front, but the front speed and temperature pulsate in a periodic or quasiperiodic fashion. Since the actual product produced depends on the temperature of the combustion wave, such instabilities are manifested by striations of different products in the sample. Two-dimensional instabilities have also been observed and analyzed when it is assumed that combustion only occurs on the surface of the sample. Such instabilities are generally associated with the formation of hot spots which exhibit various dynamics on the surface, e.g., propagating in a helical fashion along and around the sample. Again, they can lead to nonuniformities in the synthesized product and in fact some materials can only be synthesized by the hot temperatures associated with the spots." [http://www.esam.northwestern.edu/~bayliss/research.html]

I realize that the information is very complicated and hard to understand, but there are some valuable pieces of information in there that should help you out. Good luck!



-Susan


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