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Pair dispersion of turbulent premixed flame elements

Chaudhuri, Swetaprovo (2015) Pair dispersion of turbulent premixed flame elements. In: PHYSICAL REVIEW E, 91 (2).

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Official URL: http://dx.doi.org/10.1103/PhysRevE.91.021001

Abstract

Flame particles are mathematical points comoving with a reacting isoscalar surface in a premixed flame. In this Rapid Communication, we investigate mean square pair separation of flame particles as a function of time from their positions tracked in two sets of direct numerical simulation solutions of H-2-air turbulent premixed flames with detailed chemistry. We find that, despite flame particles and fluid particles being very different concepts, a modified Batchelor's scaling of the form <vertical bar Delta(F) (t) -Delta(F) (0)vertical bar(2)> = C-F ( <epsilon >(F)(0) Delta(F)(0))(2/3)t(2) holds for flame particle pair dispersion. The proportionality constant, however, is not universal and depends on the isosurface temperature value on which the flame particles reside. Following this, we attempt to analytically investigate the rationale behind such an observation.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Keywords: ISOTROPIC TURBULENCE; SURFACES; COMBUSTION
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 20 Apr 2015 07:05
Last Modified: 20 Apr 2015 07:05
URI: http://eprints.iisc.ernet.in/id/eprint/51234

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