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Large‐Scale Structure in Turbulent Diffusion Flames ‐ Evidence, Implications, Origins
Author(s) -
Mungal M. G.
Publication year - 1999
Publication title -
developments in chemical engineering and mineral processing
Language(s) - English
Resource type - Journals
eISSN - 1932-2143
pISSN - 0969-1855
DOI - 10.1002/apj.5500070304
Subject(s) - turbulence , buoyancy , scalar (mathematics) , turbulent diffusion , mechanics , reynolds number , scalar field , mixing (physics) , diffusion , field (mathematics) , physics , scale (ratio) , vector field , classical mechanics , statistical physics , thermodynamics , geometry , mathematics , quantum mechanics , pure mathematics
This work reviews some evidence for the existence of large‐scale structures in turbulent diffusion flames, at low and high Reynolds numbers, for free jets and jets in crossflow over a range of buoyancy conditions. The striking differences between the velocity field and the scalar field will be highlighted and implications for mixing and reaction are explored. The origins of these differences are discussed by analogy to simple large‐scale wave motions in the velocity field leading to complex mixing patterns in the scalar field.