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Updated: Jun 1, 2026

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
Published on: June 1, 2016
Alignment statistics of active and passive scalar gradients in turbulent stratified flames
Sean P Malkeson1, Nilanjan Chakraborty
1Department of Engineering, University of Liverpool, Brownlow Hill, Liverpool, United Kingdom L69 3GH.
Abstract:
The scalar gradient alignment statistics for active and passive scalar gradients (e.g., fuel mass fraction gradient and mixture fraction gradient) are presented here for turbulent stratified flames. It has been shown that, under some conditions, the active scalar gradient may align with the most extensive principal strain rate in contrast to the passive scalar gradient that remains aligned with the most compressive principal strain rate even when the active scalar gradient aligns preferentially with the most extensive principal strain rate. Physical explanations are provided for the observed behaviors.
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