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Volume 8
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

On Disintegrating Lean Hydrogen Flames in Narrow Gaps

by
Jorge Yanez
1,
Leonid Kagan
2,*,
Mike Kuznetsov
1 and
Gregory Sivashinsky
2
1
Institute for Thermal Energy Technology and Safety (ITES), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
2
School of Mathematical Sciences, Tel Aviv University, Tel Aviv 6997801, Israel
*
Author to whom correspondence should be addressed.
Fire 2025, 8(9), 345; https://doi.org/10.3390/fire8090345
Submission received: 13 July 2025 / Revised: 25 August 2025 / Accepted: 27 August 2025 / Published: 29 August 2025
(This article belongs to the Special Issue Science and Technology of Fire and Flame)
Versions Notes

Abstract

The disintegration of near-limit flames propagating through the gap of Hele–Shaw cells has recently become a subject of active research. In this paper, the flamelets resulting from the disintegration of the continuous front are interpreted in terms of the Zeldovich flame balls stabilized by volumetric heat losses. A complicated free-boundary problem for 2D self-drifting near circular flamelets is reduced to a quasi-1D model. The quasi-1D formulation is then utilized to obtain the locus of the flamelet velocity, size, heat losses, and Lewis numbers at which the self-drifting flamelets may exist.
Keywords: hydrogen flames; diffusive-thermal instability; flame-balls hydrogen flames; diffusive-thermal instability; flame-balls

Share and Cite

MDPI and ACS Style

Yanez, J.; Kagan, L.; Kuznetsov, M.; Sivashinsky, G. On Disintegrating Lean Hydrogen Flames in Narrow Gaps. Fire 2025, 8, 345. https://doi.org/10.3390/fire8090345

AMA Style

Yanez J, Kagan L, Kuznetsov M, Sivashinsky G. On Disintegrating Lean Hydrogen Flames in Narrow Gaps. Fire. 2025; 8(9):345. https://doi.org/10.3390/fire8090345

Chicago/Turabian Style

Yanez, Jorge, Leonid Kagan, Mike Kuznetsov, and Gregory Sivashinsky. 2025. "On Disintegrating Lean Hydrogen Flames in Narrow Gaps" Fire 8, no. 9: 345. https://doi.org/10.3390/fire8090345

APA Style

Yanez, J., Kagan, L., Kuznetsov, M., & Sivashinsky, G. (2025). On Disintegrating Lean Hydrogen Flames in Narrow Gaps. Fire, 8(9), 345. https://doi.org/10.3390/fire8090345

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