Results 91 to 100 of about 2,832 (254)

Numerical Investigation of a Lifted Flame With Nonequilibrium Scalar Variance and Dissipation Rate Closure Model for Flamelet Generated Manifold

open access: yesInternational Journal of Aerospace Engineering
Large eddy simulation (LES) of a turbulent lifted ethylene/nitrogen jet flame in highly-heated coflow is presented. Turbulent combustion modeling is performed by using the flamelet generated manifold (FGM) approach and presumed probability density ...
Zhengxin Lai, Wenyan Song, Qiuyin Wang
doaj   +1 more source

An Experimental Study on the Effects of Pre-Chamber Geometry on the Combustion Characteristics of Ammonia/Air Mixtures Using Turbulent Jet-Post Spark Ignition Strategy

open access: yesEnergies
As a carbon-free fuel, ammonia faces challenges in engine applications due to its low flame propagation speed and high ignition energy. The pre-chamber turbulent jet-post spark ignition strategy (TJ-PSI) has been proven effective in accelerating the ...
Yichen Gao   +7 more
doaj   +1 more source

Modern Fire Safety Protocols in the Archeological Contexts: A New Tool for Studying the Health and Behavioral Effects of Fire Use in Semi‐Closed Spaces

open access: yesArchaeometry, EarlyView.
ABSTRACT This study evaluates the application of computational fluid dynamics (CFD) simulations, integrated with controlled fire experiments, to investigate combustion processes in semi‐closed spaces. The framework enables systematic modeling of smoke dispersal, particulate transport, and hearth performance under variable morphologies and ventilation ...
Yafit Kedar
wiley   +1 more source

Circadian disruption elicits sex‐specific gut microbiota, endocannabinoidome, and lipid mediator responses

open access: yesThe FEBS Journal, EarlyView.
Circadian disruption via constant light induces sex‐specific remodeling of the microbiome, lipid mediators, and immune responses. Females exhibit broader gut microbiota alterations, reduced jejunal oxylipins, increased hypothalamic N‐acylethanolamines, and a more inflammatory cytokine profile. Muscle responses are sex‐ and fiber type‐dependent: females
Pejman A. Pashaki   +7 more
wiley   +1 more source

CFD prediction of coupled radiation heat transfer and soot production in turbulent flames [PDF]

open access: yes, 1996
The mechanisms governing the formation and destruction of soot in turbulent combustion are intimately coupled to thermal radiation due to the strong dependence of sooting processes and radiative loss on temperature.
Bressloff, N., Bressloff, N. W.
core  

Numerical investigation of forced ignition in laminar counterflow non-premixed methane-air flames

open access: yes, 2007
Simulations of forced ignition of non-premixed laminar counterflow flames are used to study the effect of strain rate on ignition success. A one dimensional calculation is performed, using detailed methane chemical kinetics and treating the spark as an ...
Richardson, E.S., Mastorakos, E.
core   +1 more source

Large-Eddy Simulation of combustion instabilities in a variable-length combustor. [PDF]

open access: yes, 2013
This article presents a simulation of a model rocket combustor with continuously variable acoustic properties thanks to a variable-length injector tube. Fully compressible Large-Eddy Simulations are conducted using the AVBP code.
Garby, Romain   +5 more
core   +1 more source

The Diremption of Meaning

open access: yesModern Theology, EarlyView.
Abstract Examining work by Rowan Williams, this essay explores what he often refers to as the ‘difficulty’ of writing theology. The difficulty of theology lies in engaging the ruse of having ultimate answers to ultimate questions. The stakes are high: ‘God‐talk’ must concern itself with truth, with reality.
Graham Ward
wiley   +1 more source

Utopia Remembers: The Soviet Past in the Imagined Communist Future

open access: yesThe Russian Review, EarlyView.
Abstract After a twenty‐five‐year hiatus, the reappearance of utopian literature in 1957 prompted Soviet literary watchdogs to corral the subgenre into an ideologically‐acceptable mold. A key requirement was for future generations to be depicted as reverently commemorating the past.
Antony Kalashnikov
wiley   +1 more source

Filtered density functions from direct numerical simulation of a reactive jet in cross-flow

open access: yes, 2010
Direct numerical simulation (DNS) with multi-step hydrogen-air chemical kinetics is used to investigate the nearfield of a flame stabilized above a reactive jet in cross-flow (JICF). JICF configurations are typically used where rapid mixing is desirable;
Grout, Ray W.   +9 more
core  

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