Soret diffusion boosts linear instability growth rates in lean hydrogen flames (phi<1.7) but reduces them in richer mixtures, accelerates small-scale wrinkles, and cuts large finger structure size by one-third in nonlinear regimes.
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Effects of Soret diffusion on the intrinsic instability of premixed hydrogen/air flames
Soret diffusion boosts linear instability growth rates in lean hydrogen flames (phi<1.7) but reduces them in richer mixtures, accelerates small-scale wrinkles, and cuts large finger structure size by one-third in nonlinear regimes.