Seahawks expect invitation to White House, will wait to decide on visit https://www.nytimes.com/athletic/7070536/2026/02/25/seahawks-white-house-donald-trump-visit/
Before you head out for the weekend, don't miss today's Metacurity for the crucial cybersecurity developments you should know, including
--A database with 149 million usernames and passwords was exposed on the internet,
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--FBI asked Microsoft to unlock encrypted laptops,
--Under Armour is investigating massive data breach,
--Tech investors want the US government to prob…
Large eddy simulation of turbulent swirl-stabilized flames using the front propagation formulation: impact of the resolved flame thickness
Ruochen Guo, Yunde Su, Yuewen Jiang
https://arxiv.org/abs/2602.21940 https://arxiv.org/pdf/2602.21940 https://arxiv.org/html/2602.21940
arXiv:2602.21940v1 Announce Type: new
Abstract: This work extends the front propagation formulation (FPF) combustion model to large eddy simulation (LES) of swirl-stabilized turbulent premixed flames and investigates the effects of resolved flame thickness on the predicted flame dynamics. The FPF method is designed to mitigate the spurious propagation of under-resolved flames while preserving the reaction characteristics of filtered flame fronts. In this study, the model is extended to account for non-adiabatic effects and is coupled with an improved sub-filter flame speed estimation that resolves the inconsistency arising from heat-release effects on local sub-filter turbulence. The performance of the extended FPF method is validated by LES of the TECFLAM swirl-stabilized burner, where the results agree well with experimental measurements. The simulations reveal that the stretching of vortical structures in the outer shear layer leads to the formation of trapped flame pockets, which are identified as the physical mechanism responsible for the secondary temperature peaks observed in the experiment. The prediction of this phenomenon is shown to be strongly dependent on the resolved flame thickness, when the filter size is used for modeling sub-filter flame wrinklings. Without proper modeling of the chemical steepening effects, the thickness of the resolved flame brush is over-predicted, causing the flame consumption rate to be under-estimated. Consequently, the flame brush detaches from the outer shear layer, resulting in a failure to capture the flame pockets and the associated secondary temperature peaks.
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Filings: WBD projects CNN will generate $1.8B in revenue and $600M in adjusted EBITDA for FY 2026; docs show CNN had revenue of $2.2B in 2021 and $1.8B in 2023 (Alex Weprin/The Hollywood Reporter)
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Warner Bros. won a record-tying 11 awards at the 98th Oscars, followed by Netflix's six; Apple, Disney, Focus, and Neon had one each, while Paramount had none (Catherine Shoard/The Guardian)
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That UPenn breach affected only ten people.
A class action lawsuit against Penn over an October 2025 data breach at the Graduate School of Education will not proceed after a new court filing revealed on Monday that fewer than 10 people were affected by the incident.
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