Some characteristics of longitudinal vortices produced by line-source heating in a low-speed wind tunnel

Smith, M. C.; Haines, Donald A.; Main, William A.

doi:10.1016/0017-9310(86)90034-7

Cited by 13 publications

(3 citation statements)

References 7 publications

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“…Many of the observed fire plumes exhibited significant near-surface vertical vorticity which is best supported by the first process which relies upon the reorientation of ambient vorticity [45]. Wind tunnel studies of the longitudinal vortex pair offer further support for the ambient vorticity process as Smith et al [71] found the vorticity in the streamwise vortex pair to agree quite well with the vorticity of the ambient flow as it approached the heat source. This is not to suggest that the buoyancy generated from the fire has no impact, just that it is not the dominant forcing for the development of the vortex pair.…”

Section: Counter-rotating Longitudinal Vortexmentioning

confidence: 92%

Review of Vortices in Wildland Fire

Forthofer

Goodrick

2011

Journal of Combustion

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Vortices are almost always present in the wildland fire environment and can sometimes interact with the fire in unpredictable ways, causing extreme fire behavior and safety concerns. In this paper, the current state of knowledge of the interaction of wildland fire and vortices is examined and reviewed. A basic introduction to vorticity is given, and the two common vortex forms in wildland fire are analyzed: fire whirls and horizontal roll vortices. Attention is given to mechanisms of formation and growth and how this information can be used by firefighters.

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Section: Counter-rotating Longitudinal Vortexmentioning

confidence: 92%

Review of Vortices in Wildland Fire

Forthofer

Goodrick

2011

Journal of Combustion

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“…Many of the observed fire plumes exhibited significant nearsurface vertical vorticity, which is best supported by the first process, which relies upon the reorientation of ambient vorticity (Cunningham et al 2005). Wind tunnel studies of the longitudinal vortex pair offer further support for the ambient vorticity process as Smith et al (1986) found the vorticity in the streamwise vortex pair to agree quite well with the vorticity of the ambient flow as it approached the heat source. This is not to suggest that the buoyancy generated from the fire has no impact, just that it is not the dominant forcing for the development of the vortex pair.…”

Section: Counter-rotating Longitudinal Vortex Pair-mentioning

confidence: 76%

Synthesis of knowledge of extreme fire behavior: volume 2 for fire behavior specialists, researchers, and meteorologists

Werth¹,

Potter²,

Alexander³

et al. 2016

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“…Additional wildland fire observations highlighted in Haines and Smith (1987) led to the identification of three different types of turbulent horizontal roll vortices, with their axes of rotation either parallel or transverse to the ambient wind direction. Smith et al (1986) and Haines and Smith (1992) further assessed horizontal roll vortex development via experiments conducted in a wind tunnel; they were able to observe the formation of horizontal roll vortex pairs above a heated nichrome wire embedded on the floor of the wind tunnel under light wind speeds (~1 m s −1 ) as well as bent-over (collapsed) vortex pairs in response to turbulence that was introduced into the wind tunnel air flow (Fig. 3).…”

Section: Investigations Of Fire-induced Turbulent Vortex Structures I...mentioning

confidence: 99%

Atmospheric turbulence and wildland fires: a review

Heilman

2023

Int. J. Wildland Fire

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The behaviour of wildland fires and the dispersion of smoke from those fires can be strongly influenced by atmospheric turbulent flow. The science to support that assertion has developed and evolved over the past 100+ years, with contributions from laboratory and field observations, as well as modelling experiments. This paper provides a synthesis of the key laboratory- and field-based observational studies focused on wildland fire and atmospheric turbulence connections that have been conducted from the early 1900s through 2021. Included in the synthesis are reports of anecdotal turbulence observations, direct measurements of ambient and fire-induced turbulent flow in laboratory and wildland environments, and remote sensing measurements of fire-induced turbulent plume dynamics. Although considerable progress has been made in advancing our understanding of the connections between atmospheric turbulence and wildland fire behaviour and smoke dispersion, gaps in that understanding still exist and are discussed to conclude the synthesis.

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Some characteristics of longitudinal vortices produced by line-source heating in a low-speed wind tunnel

Cited by 13 publications

References 7 publications

Review of Vortices in Wildland Fire

Review of Vortices in Wildland Fire

Synthesis of knowledge of extreme fire behavior: volume 2 for fire behavior specialists, researchers, and meteorologists

Atmospheric turbulence and wildland fires: a review

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