File:Fse-diffusion-flame-v2.svg

Fse-diffusion-flame-v2.svg (SVG file, nominally 900 × 600 pixels, file size: 9 KB)

Summary

Zones of a candle flame, a laminar diffusion flame: the inner fuel-rich zone, the luminous soot zone and the outer zone where oxygen arrives and the burnout is completed. Based on Iqbal and Salley (2004), pp. 3-8 to 3-9, Simmons (2002), p. 1-151, and Van Rossum (2027), §4.3.

Original vector illustration for Diffusion flame, level 2 Intermediate.

Source basis: Iqbal and Salley (2004), pp. 3-8 to 3-9 (candle; three zones; 590 to 680 °C; incandescent carbon particles; invisible outer zone); Simmons (2002), p. 1-151 (fuel-rich yellow carbon zone, hot blue zone on the air side, maximum temperature on the air side); Van Rossum (2027), §4.3 (oxygen by diffusion; outer part hottest; blue and yellow-orange colours). Figure 3-3 of Iqbal and Salley (2004), p. 3-9, may guide the shape: redraw, do not copy.
Alt text: Candle flame cross-section with a dark inner zone, a yellow luminous zone with soot, and a thin invisible outer zone where oxygen arrives.

Licensing

New drawing by Fire Safety Academy. © Fire Safety Academy.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	16:52, 2 November 2026		900 × 600 (9 KB)	Lisa (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity

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Diffusion flame

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Short title	Zones of a candle flame, a laminar diffusion flame: the inner fuel-rich zone, the luminous soot zone and the outer zone where oxygen arrives and the burnout is completed. Based on Iqbal and Salley (2004), pp. 3-8 to 3-9, Simmons (2002), p. 1-151, and Van Rossum (2027), §4.3.
Image title	Candle flame cross-section with a dark inner zone, a yellow luminous zone with soot, and a thin invisible outer zone where oxygen arrives. Source basis: Iqbal and Salley (2004), pp. 3-8 to 3-9 (candle; three zones; 590 to 680 °C; incandescent carbon particles; invisible outer zone); Simmons (2002), p. 1-151 (fuel-rich yellow carbon zone, hot blue zone on the air side, maximum temperature on the air side); Van Rossum (2027), §4.3 (oxygen by diffusion; outer part hottest; blue and yellow-orange colours). Figure 3-3 of Iqbal and Salley (2004), p. 3-9, may guide the shape: redraw, do not copy.
Width	900
Height	600