Vorticity Generation in Jet Diffusion Flames

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Abstract
A novel method to analyze the vorticity generation or destruction in jet diffusion Flames is presented. The analysis employs a generic flame structure and a single conserved scalar to examine the vorticity generation or destruction in jet diffusion flames. The analysis shows that the volumetric expansion and baroclinicity can result in vorticity destruction or generation depending on the flame structure, or the stoichiometry. Three regimes concerning vorticity generation or destruction are identified for jet diffusion flames. The analysis also defines a non-dimensional parameter, describing the relative importance of baroclinicity to volumetric expansion. The parameter is the ratio of Reynolds number to Froude number and multiplied by the square root of the Schmidt number.

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