000014475 001__ 14475
000014475 005__ 20161115100152.0
000014475 04107 $$aeng
000014475 046__ $$k2016-08-21
000014475 100__ $$aCoenen, Wilfried
000014475 24500 $$aGlobal stability analysis of line-fire flickering

000014475 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014475 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014475 506__ $$arestricted
000014475 520__ $$2eng$$aIn the present work we investigate the flickering of planar jet diffusion flames as a global instability mode. Our study attempts to give a quantitative description of the dynamics of the unsteady processes observed in line fires, which have recently been shown to play a key role in their spread rate. Because the character of the instability is purely hydrodynamic, the flame can be described in the infinitely fast reaction limit. The analysis permits the determination of the critical conditions, in terms of the Reynolds and the Froude number, for the onset of the global instability, as well as its associated frequency. The analysis is extended to include spatially periodicity in the spanwise direction. It is investigated if there is a spanwise wave number that maximizes the growth rate of the global instability mode, explaining the spanwise undulations with peaks and troughs that prevail in realistic line fires.

000014475 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014475 653__ $$a

000014475 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014475 720__ $$aCoenen, Wilfried
000014475 8560_ $$ffischerc@itam.cas.cz
000014475 8564_ $$s109473$$uhttps://invenio.itam.cas.cz/record/14475/files/TS.FM03-3.05.pdf$$yOriginal version of the author's contribution as presented on CD,  page 617, code TS.FM03-3.05
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000014475 962__ $$r13812
000014475 980__ $$aPAPER