Contents
Fse-critical-velocity-v1.svg (SVG file, nominally 900 × 600 pixels, file size: 7 KB)
Summary
Airflow below the critical velocity (top): smoke flows back upstream under the ceiling. Airflow at or above the critical velocity (bottom): no smoke upstream of the fire. Based on Klote (2002), p. 4-279, and Ferreira and Strege (2005), p. 11.
Original illustration for Critical velocity, level 4 Expert.
- Source basis: Klote (2002), p. 4-279 (critical velocity to prevent smoke flowing upstream in a corridor); Ferreira and Strege (2005), p. 11 (insufficient velocity or hot smoke gives backflow at the upper part of an opening)
- Alt text: Two corridor sections: weak airflow with smoke flowing back upstream under the ceiling; stronger airflow with all smoke kept downstream.
Licensing
New drawing by Fire Safety Academy. © Fire Safety Academy.
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:33, 2 November 2026 | | 900 × 600 (7 KB) | Jan (talk | contribs) | Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity |
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