Zobrazeno 1 - 10
of 6 133
pro vyhledávání: '"Daou A"'
Publikováno v:
BSGF - Earth Sciences Bulletin, Vol 195, p 5 (2024)
In the Western Alps, a first Late Cretaceous to Eocene “Pyrenean-Provençal” compressive phase accommodating N-S shortening resulting from the convergence between Africa and Eurasia is classically described. It is followed by the Neogene “Alpin
Externí odkaz:
https://doaj.org/article/ea5d454168484c80b4c3447b17b04be2
Autor:
Daou, Joel, Rajamanickam, Prabakaran
The hydrodynamic instabilities of propagating interfaces in Hele-Shaw channels or porous media under the influence of an imposed flow and gravitational acceleration are investigated within the framework of Darcy's law. The stability analysis pertains
Externí odkaz:
http://arxiv.org/abs/2411.04627
Autor:
Rajamanickam, Prabakaran, Daou, Joel
Publikováno v:
Phys. Fluids 36 (2024) 123620
This paper investigates the theoretical implications of applying Darcy's law to premixed flames, a topic of growing interest in research on flame propagation in porous media and confined geometries. A multiple-scale analysis is carried out treating t
Externí odkaz:
http://arxiv.org/abs/2411.04622
Publikováno v:
Proc. Combust. Inst. (2024) 40(1-4), 105258
The three-dimensional diffusive-thermal stability of a two-dimensional flame propagating in a Poiseuille flow is examined. The study explores the effect of three non-dimensional parameters, namely the Lewis number $Le$, the Damk\"ohler number $Da$, a
Externí odkaz:
http://arxiv.org/abs/2407.05422
Autor:
Rajamanickam, Prabakaran, Daou, Joel
Publikováno v:
Proc. Combust. Inst. (2014) 40(1-4), 105671
The Darrieus--Landau instability of premixed flames propagating in a narrow Hele-Shaw channel in the presence of a strong shear flow is investigated, incorporating also the Rayleigh--Taylor and diffusive-thermal instabilities. The flow induces shear-
Externí odkaz:
http://arxiv.org/abs/2407.05409
Autor:
Rajamanickam, Prabakaran, Daou, Joel
Publikováno v:
Prog. Scale Model. Int. J. (2023), 4(1), 2
A tricritical point as a crossover between (stationary finite-wavelength) type-I$_s$ and (stationary longwave) type-II$_s$ bifurcations is identified in the study of diffusive-thermal (Turing) instability of flames propagating in a Hele-Shaw channel
Externí odkaz:
http://arxiv.org/abs/2407.00109
Stability of diffusion flames under shear flow: Taylor dispersion and the formation of flame streets
Publikováno v:
Combust. Flame (2023) 257, 113003
Diffusion flame streets, observed in non-premixed micro-combustion devices, align parallel to a shear flow. They are observed to occur in mixtures with high Lewis number ($Le$) fuels, provided that the flow Reynolds number, or the Peclet number $Pe$,
Externí odkaz:
http://arxiv.org/abs/2407.01610
Autor:
Rajamanickam, Prabakaran, Daou, Joel
Publikováno v:
Combust. Flame (2023) 258, 113077
Propagation of premixed flames having thick reaction zones in rapidly-varying, small-scale, zero-mean, spatio-temporal periodic flows is considered. Techniques of large activation energy asymptotics and homogenization theory are used to determine the
Externí odkaz:
http://arxiv.org/abs/2406.19427
Autor:
Daou, Joel, Rajamanickam, Prabakaran
Publikováno v:
Combust. Theory Model. (2024) 28(1), 20-35
The stability of a thick planar premixed flame, propagating steadily in a direction transverse to that of unidirectional shear flow, is studied. A linear stability analysis is carried out in the asymptotic limit of infinitely large activation energy,
Externí odkaz:
http://arxiv.org/abs/2406.19093
Autor:
Rajamanickam, Prabakaran, Daou, Joel
Publikováno v:
Combust. Theory Model. 27(4), (2023) 487-507
Direct interactions between the flow field and the chemical reaction in premixed flames occur when the reaction zone thickness is comparable to, or greater than flow length scales. To study such interactions, a laminar model is considered that has di
Externí odkaz:
http://arxiv.org/abs/2406.15190