Turbulence Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence Heat and Mass Transfer
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf
ISBN Print: 978-1-56700-262-1
ISSN: 2377-2816
Transient behavior of turbulent scalar transport in premixed flames
page 12
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.420
ABSTRACT
A statistically planar one-dimensional developing premixed turbulent flame is studied both theoretically and numerically in order to highlight a link between transition from gradient to countergra-dient scalar transport and the flame development. The flux is gradient during an early stage of flame development, followed by transition to countergradient transport at certain instant, with the transition time being decreased when the laminar flame speed is increased or the rms turbulent velocity is decreased