File:Fse-critical-water-application-rate-v1.svg

Fse-critical-water-application-rate-v1.svg (SVG file, nominally 900 × 600 pixels, file size: 8 KB)

Summary

Energy balance at a burning surface under water spray. Left: evaporating water removes heat. Right: on a horizontal surface a puddle also blocks flame heat and fuel vapour. Based on Tewarson (2002), pp. 3-147 to 3-148.

Original illustration for Critical water application rate, level 4 Expert.

Source basis: Tewarson (2002), p. 3-147 (Eqs. 123 to 125: external and flame heat, re-radiation loss, heat removed by vaporisation of water) and p. 3-148 (Eq. 126: blockage of flame heat flux and escape of fuel vapours by a puddle on a horizontal surface)
Alt text: Two cross-sections of a burning plastic slab under water spray: left, water evaporates on the surface; right, a puddle covers part of it.

Licensing

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

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:28, 2 November 2026		900 × 600 (8 KB)	Jan (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity

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Critical water application rate

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Short title	Energy balance at a burning surface under water spray. Left: evaporating water removes heat. Right: on a horizontal surface a puddle also blocks flame heat and fuel vapour. Based on Tewarson (2002), pp. 3-147 to 3-148.
Image title	Two cross-sections of a burning plastic slab under water spray: left, water evaporates on the surface; right, a puddle covers part of it. Source basis: Tewarson (2002), p. 3-147 (Eqs. 123 to 125: external and flame heat, re-radiation loss, heat removed by vaporisation of water) and p. 3-148 (Eq. 126: blockage of flame heat flux and escape of fuel vapours by a puddle on a horizontal surface)
Width	900
Height	600