File:Fse-smoke-movement-v2.svg

Fse-smoke-movement-v2.svg (SVG file, nominally 900 × 600 pixels, file size: 7 KB)

Summary

Pressure-driven opening flow can have opposite directions by height. Based on Australian Building Codes Board et al. (2005), p. 2.5-6.

Diagram for the article Smoke movement (Fire Safety Academy wiki, level 1 Basic).

Source basis: Australian Building Codes Board et al. (2005), p. 2.5-6
Alt text: Smoke leaves through the upper doorway as cooler air enters through the lower part.

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

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	Date/Time	Dimensions	User	Comment
current	16:01, 2 November 2026	900 × 600 (7 KB)	Sanne (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity
	09:05, 2 November 2026	900 × 600 (7 KB)	Sanne (talk \| contribs)	Add modest Fire Safety Academy logo-icon watermark
	08:09, 2 November 2026	900 × 600 (4 KB)	Sanne (talk \| contribs)	Upload fse-smoke-movement-v2.svg: diagram for Smoke movement (level-1 visual plan V2)

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Short title	Smoke leaves through the upper doorway as cooler air enters through the lower part.
Image title	Cross-section of a fire room and a neighbouring room joined by an open doorway. In the fire room a deep hot smoke layer fills the upper part. The pressure difference across the doorway varies with height: above a neutral level smoke flows out, below it cooler fresh air flows in, with arrow lengths following the pressure profile. The outflowing smoke rises as a door jet into the neighbouring room, and the opposing flows mix where they meet.
Width	900
Height	600